The following discussion and analysis should be read with "Selected Financial
Data" and our financial statements and notes included elsewhere in this annual
report on Form 10-K.

Overview

We are a biopharmaceutical company with a mission of pioneering medicines that transform patients' lives. We are devoting most of our resources to the commercialization or development of our three most advanced drugs and drug candidates:



•We are commercializing XERMELO (telotristat ethyl), an orally-delivered small
molecule drug, in the United States for the treatment of carcinoid syndrome
diarrhea in combination with somatostatin analog, or SSA, therapy in adults
inadequately controlled by SSA therapy. We have granted Ipsen Pharma SAS, or
Ipsen, an exclusive, royalty-bearing right to commercialize XERMELO outside of
the United States and Japan. Ipsen is commercializing XERMELO in the United
Kingdom, Germany and multiple additional countries. We are also developing
telotristat ethyl as a treatment for biliary tract cancer and are conducting a
Phase 2a clinical trial of telotristat ethyl in biliary tract cancer patients.
•We are developing Zynquista (sotagliflozin), an orally-delivered small molecule
drug candidate, as a treatment for type 1 diabetes. The FDA has issued a
complete response letter regarding our application for regulatory approval to
market sotagliflozin for type 1 diabetes in the United States and has confirmed
that position in denying two appeals of the complete response letter. Zynquista
has been approved in the European Union for use as an adjunct to insulin therapy
to improve glycemic control in adults with type 1 diabetes and a body mass index
> 27 kg/m2 , who could not achieve adequate glycemic control despite optimal
insulin therapy.
We are also developing sotagliflozin as a treatment for type 2 diabetes, heart
failure and chronic kidney disease. We are conducting a comprehensive Phase 3
development program, which includes one long-term outcomes study designed to
demonstrate benefits in chronic heart failure and chronic kidney disease in type
2 diabetes patients and another long-term outcomes study designed to demonstrate
benefits in acute decompensated heart failure in patients with and without type
2 diabetes. We have reported preliminary top-line results from the first four
Phase 3 clinical trials of sotagliflozin in adults living with type 2 diabetes.
•We are developing LX9211, an orally-delivered small molecule drug candidate, as
a treatment for neuropathic pain. We have reported top-line results from two
Phase 1 clinical trials of LX9211 and are preparing to initiate a Phase 2
clinical trial of LX9211.
Compounds from our most advanced drug programs, as well as compounds from a
number of additional drug discovery and development programs that we have
advanced into various stages of clinical and preclinical development, originated
from our own internal drug discovery efforts. These efforts were driven by a
systematic, target biology-driven approach in which we used gene knockout
technologies and an integrated platform of advanced medical technologies to
systematically study the physiological and behavioral functions of almost 5,000
genes in mice and assessed the utility of the proteins encoded by the
corresponding human genes as potential drug targets. We have identified and
validated in living animals, or in vivo, more than 100 targets with promising
profiles for drug discovery.
We are working both independently and through strategic collaborations and
alliances with third parties to capitalize on our drug target discoveries and
drug discovery and development programs. We seek to retain exclusive or
co-exclusive rights to the benefits of certain drug discovery and development
programs by developing and commercializing drug candidates from those programs
internally, particularly in the United States for indications treated by
specialist physicians. We seek to collaborate with other pharmaceutical and
biotechnology companies with respect to drug discovery or the development and
commercialization of certain of our drug candidates, particularly with respect
to commercialization in territories outside the United States or
commercialization in the United States for indications treated by primary care
physicians, or when the collaboration may otherwise provide us with access to
expertise and resources that we do not possess internally or are complementary
to our own.

We commercially launched XERMELO following regulatory approval in the United
States in February 2017 for the treatment of carcinoid syndrome diarrhea in
combination with SSA therapy in adults inadequately controlled by SSA therapy.
Prior to the launch of XERMELO, we derived substantially all of our revenues
from strategic collaborations and other research and development collaborations
and technology licenses. To date, we have generated a substantial portion of our
revenues from a limited number of sources.
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Our operating results and, in particular, our ability to generate additional
revenues are dependent on many factors, including our ability to successfully
commercialize XERMELO in the United States and the amount of revenues generated
from such commercialization efforts; Ipsen's ability to successfully
commercialize XERMELO outside of the United States and Japan and our receipt of
any milestone payments and royalties; the success of our ongoing nonclinical and
clinical development efforts and ability to obtain necessary regulatory
approvals of the drug candidates which are the subject of such efforts; our
success in establishing new collaborations and licenses, including for the
development and commercialization of sotagliflozin; and general and
industry-specific economic conditions which may affect research and development
expenditures.

Future revenues from our commercialization of XERMELO are uncertain because they depend on a number of factors, including market acceptance of XERMELO, the success of our sales, marketing, distribution and other commercialization activities and the cost and availability of reimbursement for XERMELO.



Future revenues from our collaboration with Ipsen are uncertain because they
depend, to a large degree, on the achievement of milestones and payment of
royalties we earn from Ipsen's commercialization of XERMELO. Our ability to
secure future revenue-generating agreements will depend upon our ability to
address the needs of our potential future collaborators and licensees, and to
negotiate agreements that we believe are in our long-term best interests. We may
determine, as we have with certain of our drug candidates, including XERMELO in
the United States and Japan, that our interests are better served by retaining
rights to our discoveries and advancing our therapeutic programs to a later
stage, which could limit our near-term revenues and increase expenses. Because
of these and other factors, our operating results have fluctuated in the past
and are likely to do so in the future, and we do not believe that
period-to-period comparisons of our operating results are a good indication of
our future performance.

Since our inception, we have incurred significant losses and, as of December 31,
2019, we had an accumulated deficit of $1.3 billion. Our losses have resulted
principally from costs incurred in research and development, selling, general
and administrative costs associated with our operations, and non-cash
stock-based compensation expenses associated with stock options and restricted
stock granted to employees and consultants. Research and development expenses
consist primarily of salaries and related personnel costs, external research
costs related to our nonclinical and clinical efforts, material costs, facility
costs, depreciation on property and equipment, and other expenses related to our
drug discovery and development programs. Selling, general and administrative
expenses consist primarily of salaries and related expenses for executive, sales
and marketing, and administrative personnel, professional fees and other
corporate expenses, including information technology, facilities costs and
general legal activities. We expect to continue to incur significant research
and development costs in connection with the continuing development of our drug
candidates. As a result, we will need to generate significantly higher revenues
to achieve profitability.

Critical Accounting Policies

Revenue Recognition

Product Revenues

Product revenues consist of commercial sales of XERMELO in the United States and
sales of bulk tablets of XERMELO to Ipsen. Product revenues are recognized when
the customer obtains control of our product, which occurs upon delivery to the
customer. We recognize product revenue net of applicable reserves for variable
consideration, including allowances for customer credits, estimated rebates,
chargebacks, discounts, returns, distribution service fees, and government
rebates, such as Medicare Part D coverage gap reimbursements in the United
States, as discussed below. Our net product revenues reflect our best estimates
of the amounts of consideration to which we are entitled based on the terms of
the respective underlying contracts. Product shipping and handling costs are
considered a fulfillment activity when control transfers to our customers and
such costs are included in cost of sales.

Customer Credits: Our customers are offered various forms of consideration,
including allowances, service fees and prompt payment discounts. We expect that
our customers will earn prompt payment discounts. As a result, we deduct the
full amount of those discounts from total product sales when revenues are
recognized. Service fees are also deducted from product sales as they are
earned.

Rebates: Allowances for rebates include mandated discounts under the Medicaid
Drug Rebate Program. Rebate amounts are based upon contractual agreements or
legal requirements with public sector (e.g., Medicaid) benefit providers.
Rebates are amounts owed after the final dispensing of the product to a benefit
plan participant and are based upon contractual agreements or legal requirements
with public sector benefit providers. The allowance for rebates is based on
statutory discount
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rates and expected utilization. Our estimates for expected utilization of
rebates are based on third party market research data and data received from the
specialty pharmacies. Rebates are generally invoiced and paid in arrears so that
the accrual balance consists of an estimate of the amount expected to be
incurred for the current quarter's activity, plus an accrual balance for known
unpaid rebates from the prior quarter. If actual future rebates vary from
estimates, we may need to adjust prior period accruals, which would affect
revenue in the period of adjustment.

Chargebacks: Chargebacks are discounts that occur when contracted customers
purchase directly from a specialty pharmacy or distributor, who acts as a
retailer. Contracted customers, which currently consist primarily of Public
Health Service Institutions, non-profit clinics, and federal government entities
purchasing via the Federal Supply Schedule, generally purchase the product at a
discounted price. The specialty pharmacy or distributor, in turn, charges back
to us the difference between the price paid by the specialty pharmacy or
distributor and the discounted price paid to the specialty pharmacy or
distributor by the customer. The allowance for chargeback is based on known
sales to contracted customers.

Medicare Part D Coverage Gap: The Medicare Part D prescription drug benefit
mandates manufacturers to fund a portion of the Medicare Part D insurance
coverage gap for prescription drugs sold to eligible patients. Our estimates for
the expected Medicare Part D coverage gap are based on data received from the
specialty pharmacies and projections based on historical data. Funding of the
coverage gap is generally invoiced and paid in arrears so that the accrual
balance consists of an estimate of the amount expected to be incurred for the
current quarter's activity, plus an accrual balance for known prior quarters. If
actual future funding varies from estimates, we may need to adjust prior period
accruals, which would affect revenues in the period of adjustment.

Co-payment assistance: Patients who have commercial insurance and meet certain
eligibility requirements may receive co-payment assistance. We accrue a
liability for co-payment assistance based on actual program participation and
estimates of program redemption using data provided by third-party
administrators.

Collaborative Agreements



Revenues under collaborative agreements include both license revenue and
contract research revenue. We perform the following five steps in determining
the amount of revenue to recognize as it fulfills its performance obligations
under each of its agreements: (i) identify the contract(s) with a customer; (ii)
identify the performance obligation in the contract; (iii) determine the
transaction price; (iv) allocate the transaction price to the performance
obligation in the contract, and (v) recognize revenue when (or as) we satisfy
the performance obligation. We apply this five-step model to contracts when it
is probable that we will collect the consideration to which we are entitled in
exchange for the goods or services we transfer to the customer. At contract
inception, we assess the goods or services promised within each contract and
determine those that are performance obligations, and assess whether each
promised good or service is distinct. We then recognize as revenue the amount of
the transaction price that is allocated to the respective performance obligation
when (or as) the performance obligation is satisfied. We develop assumptions
that require judgment to determine the stand-alone selling price for each
performance obligation identified in the contract.

At contract inception, we evaluate whether development milestones are considered
probable of being reached and estimate the amount to be included in the
transaction price using the most likely amount method. If it is probable that a
significant revenue reversal will not occur, the associated development
milestone value is included in the transaction price. Development milestones
that are not within our control or the control of our licensee, including those
requiring regulatory approval, are not considered probable of being achieved
until those approvals are received. The transaction price is allocated to each
performance obligation on a relative stand-alone selling price basis, for which
we recognize revenue when (or as) the performance obligation is satisfied. At
the end of each reporting period, we re-evaluate the probability of achievement
of the development milestones and any related constraint, and if necessary,
adjust our estimates of the overall transaction price. Any such adjustments are
recorded on a cumulative catch-up basis, which would affect collaboration
revenues in the period of adjustment.

In agreements in which a license to our intellectual property is determined distinct from other performance obligations identified in the agreement, we recognize revenue when the license is transferred to the licensee and the licensee is able to use and benefit from the license.



For agreements that include sales-based royalties, including milestones based on
a level of sales, the license is deemed to be the predominant item to which the
royalties relate and we recognize revenue at the later of (i) when the related
sales occur or (ii) when the performance obligation to which some or all of the
royalty has been allocated has been satisfied (or partially satisfied).

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We may receive payments from our licensees based on billing schedules established in each contract. Upfront payments and fees are recorded as deferred revenue upon receipt or when due, and may require deferral of revenue recognition to a future period until we perform our obligations under these agreements. Amounts are recorded as accounts receivable when our right to consideration is unconditional.

Research and Development Expenses



Research and development expenses consist of costs incurred for research and
development activities solely sponsored by us as well as collaborative research
and development activities. These costs include direct and research-related
overhead expenses and are expensed as incurred. Technology license fees for
technologies that are utilized in research and development and have no
alternative future use are expensed when incurred.

We are presently devoting most of our resources to the commercialization or development of our three most advanced drugs and drug candidates:



•XERMELO (telotristat ethyl), an orally-delivered small molecule drug that we
are commercializing for carcinoid syndrome diarrhea and developing for biliary
tract cancer;
•Zynquista (sotagliflozin), an orally-delivered small molecule drug candidate
that we are developing as a treatment for type 1 diabetes and type 2 diabetes,
heart failure and chronic kidney disease; and
•LX9211, an orally-delivered small molecule drug candidate, that we are
developing as a treatment for neuropathic pain.
Compounds from our most advanced drug programs, as well as compounds from a
number of additional drug discovery and development programs that we have
advanced into various stages of clinical and preclinical development, originated
from our own internal drug discovery efforts. These efforts were driven by a
systematic, target biology-driven approach in which we used gene knockout
technologies and an integrated platform of advanced medical technologies to
systematically study the physiological and behavioral functions of almost 5,000
genes in mice and assessed the utility of the proteins encoded by the
corresponding human genes as potential drug targets. We have identified and
validated in living animals, or in vivo, more than 100 targets with promising
profiles for drug discovery.

The drug development process takes many years to complete. The cost and length
of time varies due to many factors including the type, complexity and intended
use of the drug candidate. We estimate that drug development activities are
typically completed over the following periods:
          Phase                 Estimated Completion Period
Preclinical development                  1-2 years
Phase 1 clinical trials                  1-2 years
Phase 2 clinical trials                  1-2 years
Phase 3 clinical trials                  2-4 years



We expect research and development costs to remain substantial in the future as
we continue to fund our nonclinical and clinical development efforts and advance
new drug candidates into clinical development. Due to the variability in the
length of time necessary for drug development, the uncertainties related to the
cost of these activities and ultimate ability to obtain governmental approval
for commercialization, accurate and meaningful estimates of the ultimate costs
to bring our potential drug candidates to market are not available.

We record significant accrued liabilities related to unbilled expenses for
products or services that we have received from service providers, specifically
related to ongoing nonclinical studies and clinical trials. These costs
primarily relate to clinical study management, monitoring, laboratory and
analysis costs, drug supplies, toxicology studies and investigator grants. We
have multiple drugs in concurrent nonclinical studies and clinical trials at
clinical sites throughout the world. In order to ensure that we have adequately
provided for ongoing nonclinical and clinical development costs during the
period in which we incur such costs, we maintain accruals to cover these
expenses. Substantial portions of our nonclinical studies and clinical trials
are performed by third-party laboratories, medical centers, contract research
organizations and other vendors. For nonclinical studies, we accrue expenses
based upon estimated percentage of work completed and the contract milestones
remaining. For clinical studies, expenses are accrued based upon the number of
patients enrolled and the duration of the study. We monitor patient enrollment,
the progress of clinical studies and related activities to the extent possible
through internal reviews of data reported to us by the vendors and clinical site
visits. Our estimates depend on the timeliness and accuracy of
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the data provided by our vendors regarding the status of each program and total
program spending. We periodically evaluate the estimates to determine if
adjustments are necessary or appropriate based on information we
receive. Although we use consistent milestones or subject or patient enrollment
to drive expense recognition, the assessment of these costs is a subjective
process that requires judgment. Upon settlement, these costs may differ
materially from the amounts accrued in our consolidated financial statements.

Our estimates of the clinical study costs and costs to transition activities
from Sanofi for development of sotagliflozin for type 2 diabetes, heart failure
and chronic kidney disease were based on estimates of the services to be
received and efforts to be expended pursuant to contracts with multiple vendors
and the CRO that will conduct and manage the clinical studies on our behalf. The
financial terms of these agreements are subject to negotiation and vary from
contract to contract. In accruing the relevant costs, we estimated the time
period over which services will be performed and the level of effort required to
complete each study. Upon completion and settlement, these costs may differ
materially from the amounts accrued in our consolidated financial statements.

We record our research and development costs by type or category, rather than by
project. Significant categories of costs include personnel, facilities and
equipment costs and third-party and other services. In addition, a significant
portion of our research and development expenses is not tracked by project as it
benefits multiple projects. Consequently, fully-loaded research and development
cost summaries by project are not available.

Stock-based Compensation Expense



We recognize compensation expense in our statements of comprehensive income
(loss) for share-based payments, including stock options and restricted stock
units issued to employees, based on their fair values on the date of the grant,
with the compensation expense recognized over the period in which an employee is
required to provide service in exchange for the stock award. Stock-based
compensation expense for awards without performance conditions is recognized on
a straight-line basis. Stock-based compensation expense for awards with
performance conditions is recognized over the period from the date the
performance condition is determined to be probable of occurring through the time
the applicable condition is met. We had stock-based compensation expense of
$14.2 million for the year ended December 31, 2019. As of December 31, 2019,
stock-based compensation cost for all outstanding unvested options and
restricted stock units was $24.0 million, which is expected to be recognized
over a weighted-average vesting period of 1.1 years.

The fair value of stock options is estimated at the date of grant using the
Black-Scholes option-pricing model. For purposes of determining the fair value
of stock options, we segregate our options into two homogeneous groups, based on
exercise and post-vesting employment termination behaviors, resulting in
different assumptions used for expected option lives. Historical data is used to
estimate the expected option life for each group. Expected volatility is based
on the historical volatility in our stock price. The following weighted-average
assumptions were used for options granted in the years ended December 31, 2019,
2018 and 2017, respectively:
                                                                              Risk-free Interest                                     Dividend
                                                    Expected Volatility              Rate                 Expected Term                Rate
December 31, 2019:
Employees                                                         88  %                   2.2  %                4                             0  %
Officers and non-employee directors                               77  %                   2.6  %                8                             0  %
December 31, 2018:
Employees                                                         58  %                   2.6  %                4                             0  %
Officers and non-employee directors                               63  %                   2.8  %                8                             0  %
December 31, 2017:
Employees                                                         61  %                   1.7  %                4                             0  %
Officers and non-employee directors                               70  %                   2.2  %                8                             0  %



Impairment of Long-Lived Assets



Our long-lived assets include property, plant and equipment, right-of-use assets
for leases, finite-lived intangible assets and goodwill. We regularly review
long-lived assets for impairment. The recoverability of long-lived assets, other
than goodwill, is measured by comparing the assets carrying amount to the
expected undiscounted future cash flows that the asset is expected to generate.
Determining whether an impairment has occurred typically requires various
estimates and assumptions, including determining which cash flows are directly
related to the potentially impaired asset, the useful life over which cash flows
will occur, their amount, and the asset's residual value, if any. We use
internal cash flow estimates, quoted market prices
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when available and independent appraisals as appropriate to determine fair
value. We derive the required cash flow estimates from our historical experience
and our internal business plans and apply an appropriate discount rate. There
were no significant impairments of long-lived assets in 2019, 2018 or 2017.

Indefinite-lived intangible assets, composed primarily of in-process research
and development, or IPR&D, projects acquired in business combinations which have
not reached technological feasibility, are reviewed annually for impairment and
whenever events or changes in circumstances indicate that the carrying amount
may not be recoverable. Estimating future cash flows of an IPR&D product
candidate for purposes of an impairment analysis requires us to make significant
estimates and assumptions regarding the amount and timing of costs to complete
the project and the amount, timing and probability of achieving revenues from
the completed product similar to how the acquisition date fair value of the
project was determined. In 2019, we terminated certain research and development
activities related to a program for treatment of irritable bowel syndrome and as
a result, recognized $28.6 million of impairment to indefinite-lived intangible
assets. There were no impairments to indefinite-lived intangible assets in 2018
or 2017.

Goodwill is not amortized, but is tested at least annually for impairment at the
reporting unit level. We have determined that the reporting unit is the single
operating segment disclosed in our current financial statements. Impairment is
the condition that exists when the carrying amount of goodwill exceeds its
implied fair value. The first step in the impairment process is to determine the
fair value of the reporting unit and then compare it to the carrying value,
including goodwill. We determined that the market capitalization approach is the
most appropriate method of measuring fair value of the reporting unit. Under
this approach, fair value is calculated as the average closing price of our
common stock for the 30 days preceding the date that the annual impairment test
is performed, multiplied by the number of outstanding shares on that date. A
control premium, which is representative of premiums paid in the marketplace to
acquire a controlling interest in a company, is then added to the market
capitalization to determine the fair value of the reporting unit. If the fair
value exceeds the carrying value, no further action is required and no
impairment loss is recognized. Additional impairment assessments may be
performed on an interim basis if we encounter events or changes in circumstances
that would indicate that, more likely than not, the carrying value of goodwill
has been impaired. There was no impairment of goodwill in 2019, 2018 and 2017.

Business Combinations



We allocate the purchase price of acquired businesses to the tangible and
intangible assets acquired and liabilities assumed based upon their estimated
fair values on the acquisition date. The purchase price allocation process
requires management to make significant estimates and assumptions, especially at
acquisition date with respect to intangible assets and in-process research and
development.

These assumptions are based in part on historical experience and are inherently
uncertain. Examples of critical estimates in valuing certain of the intangible
assets we have acquired or may acquire in the future include but are not limited
to: the feasibility and timing of achievement of development, regulatory and
commercial milestones; expected costs to develop the in-process research and
development into commercially viable products; and future expected cash flows
from product sales.

In connection with the purchase price allocations for acquisitions, we estimate
the fair value of the contingent payments. The estimated fair value of any
contingent payments is determined utilizing a probability-based income approach
inclusive of an estimated discount rate.

Unanticipated events and circumstances may occur which may affect the accuracy or validity of such assumptions, estimates or actual results.

Recent Accounting Pronouncements

See Note 3, Recent Accounting Pronouncements, of the Notes to Consolidated Financial Statements, for a discussion of the impact of new accounting standards on our consolidated financial statements.


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Results of Operations - Comparison of Years Ended December 31, 2019, 2018 and 2017

The following discussion and analysis should be read with "Results of Operations" and our financial statements and notes included in our annual report on Form 10-K for the year ended December 31, 2018.

Revenues

Total revenues and dollar and percentage changes as compared to the prior year are as follows (dollar amounts are presented in millions):


                                                   Year Ended December 31,
                                               2019          2018         2017
Total revenues                              $ 322.1       $  63.2       $ 91.7
Dollar increase (decrease)                  $ 258.9       $ (28.5)
Percentage increase (decrease)                  410  %        (31) %



Years Ended December 31, 2019 and 2018



•Net product revenues - Net product revenue increased 22% in 2019 to $32.3
million, primarily from revenues recognized from the sale of XERMELO in the
United States. Sales of bulk tablets of XERMELO to Ipsen were comparable in both
years. Product revenues are recorded net of estimated product returns, pricing
discounts including rebates offered pursuant to mandatory federal and state
government programs and chargebacks, prompt pay discounts and distribution fees
and co-pay assistance. Revenue recognition policies require estimates of the
aforementioned sales allowances each period.
•Collaborative agreements - Revenue from collaborative agreements increased in
2019 to $289.2 million, due to $260 million in revenues recognized from amounts
payable by Sanofi pursuant to the termination of our collaboration agreement and
recognition of amounts allocated to the performance obligation for development
activities of sotagliflozin in the Sanofi collaboration agreement.

•Royalties and other revenue - Revenues from royalties and other revenue increased 44% in 2019 to $0.5 million.

In 2019, no customers for XERMELO sales represented more than 10% of revenues. In 2018, two specialty pharmacies, Biologics, Inc. and Diplomat Pharmacy, represented 25% and 14% of revenues, respectively.

In 2019 and 2018, Sanofi represented 89% and 53% of revenues, respectively.

Cost of Sales

Total cost of sales and dollar and percentage changes as compared to the prior year are as follows (dollar amounts are presented in millions):


                                                      Year Ended December 31,
                                                 2019               2018        2017
Total cost of sales                          $    3.2             $ 2.5       $ 1.9
Dollar increase                              $    0.7             $ 0.6
Percentage increase                                30   %            31  %


Years Ended December 31, 2019 and 2018



Cost of sales increased 30% in 2019 to $3.2 million. We began capitalizing
inventory in 2017 following FDA approval of XERMELO, as the related costs were
expected to be recoverable through the commercialization of the product. Costs
incurred prior to FDA approval were recorded as research and development
expenses in the consolidated statements of comprehensive income (loss). Cost of
sales consists of third-party manufacturing costs, freight and indirect overhead
costs associated with sales of XERMELO. The pre-commercialized inventory is
expected to be sold over approximately the next twelve months. As a result, cost
of sales will reflect a lower average per unit cost of materials. Cost of sales
in each of 2019 and 2018 included $1.8 million of amortization of intangible
assets related to XERMELO.

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Research and Development Expenses

Research and development expenses and dollar and percentage changes as compared to the prior year are as follows (dollar amounts are presented in millions):


                                                Year Ended December 31,
                                           2019          2018          2017
Total research and development expense   $ 91.9       $ 100.2       $ 152.2
Dollar decrease                          $ (8.3)      $ (52.0)
Percentage decrease                          (8) %        (34) %



Research and development expenses consist primarily of third-party and other
services principally related to nonclinical and clinical development activities,
salaries and other personnel-related expenses, facility and equipment costs and
stock-based compensation.

Years Ended December 31, 2019 and 2018



•Third-party and other services - Third-party and other services decreased 12%
in 2019 to $55.9 million, primarily due to decreases in professional and
consulting fees and lower external clinical development costs relating to
sotagliflozin. Third-party and other services relate principally to our clinical
trial and related development activities, such as nonclinical and clinical
studies and contract manufacturing.

•Personnel - Personnel costs decreased 3% in 2019 to $20.7 million, primarily
due to lower headcount. Salaries, bonuses, employee benefits, payroll taxes,
recruiting and relocation costs are included in personnel costs.

•Stock-based compensation - Stock-based compensation expense increased 18% in
2019 to $7.1 million, primarily due to a shorter vesting period of the annual
restricted stock unit awards granted in 2019 and 2018.

•Facilities and equipment - Facilities and equipment costs decreased 3% in 2019 to $2.7 million.

•Other - Other costs decreased 13% in 2019 to $5.5 million.

Selling, General and Administrative Expenses



Selling, general and administrative expenses and dollar and percentage changes
as compared to the prior year are as follows (dollar amounts are presented in
millions):
                                                           Year Ended December 31,
                                                       2019          2018         2017

Total selling, general and administrative expense $ 56.8 $ 63.8

    $ 66.1
Dollar decrease                                     $   (6.9)      $ (2.3)
Percentage decrease                                      (11) %        (4) %


Selling, general and administrative expenses consist primarily of personnel costs to support the commercialization of XERMELO and our research and development activities, professional and consulting fees, stock-based compensation expense, and facility and equipment costs.

Years Ended December 31, 2019 and 2018



•Personnel - Personnel costs increased 1% in 2019 to $28.4 million, primarily
due to higher incentive compensation costs. Salaries, bonuses, employee
benefits, payroll taxes, recruiting and relocation costs are included in
personnel costs.
•Professional and consulting fees - Professional and consulting fees decreased
39% in 2019 to $12.2 million, primarily due to lower marketing costs.

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•Stock-based compensation - Stock-based compensation expense increased 25% in
2019 to $7.1 million, primarily due to a shorter vesting period of the annual
restricted unit awards granted in 2019 and 2018.

•Facilities and equipment - Facilities and equipment decreased 8% in 2019 to $1.8 million.

•Other - Other costs decreased 8% in 2019 to $7.3 million, primarily due to decreases in sponsorships and contributions to charitable foundations.

Impairment Loss

Impairment loss of $28.6 million in the year ended December 31, 2019 was recognized to an indefinite-lived intangible asset associated with the 2010 acquisition of Symphony Icon, due to the decision to terminate research and development activities related to a program for irritable bowel syndrome that was among the assets acquired.

Interest Expense and Interest and Other Income, Net

Interest Expense. Interest expense was $20.7 million and $20.8 million in the years ended December 31, 2019 and 2018, respectively.



Interest and Other Income (Expense), Net. Interest and other income, net was
$3.4 million and $3.5 million in the years ended December 31, 2019 and 2018,
respectively.

Income Tax Benefit
The income tax benefit for the year ended December 31, 2019 was $6.0 million,
due to the release of the deferred tax liability related to the impairment of
the indefinite-lived intangible asset (see Note 7, Income Taxes of the Notes to
Consolidated Financial Statements, for more information). There was no income
tax expense or benefit in 2018.
Net Income (Loss) and Net Income (Loss) per Common Share
Net income was $130.1 million, or $1.16 per diluted share, in 2019 as compared
to a net loss of $120.5 million, or loss of $1.14 per share in 2018.

Liquidity and Capital Resources



We have financed our operations from inception primarily through sales of common
and preferred stock, contract and milestone payments we received under our
strategic and other collaborations, target validation, database subscription and
technology license agreements, product sales, government grants and contracts,
and financing under debt and lease arrangements. We have also financed certain
of our research and development activities under our agreements with Symphony
Icon, Inc. In December 2017, we entered into a loan agreement with BioPharma
Credit PLC and BioPharma Credit Investments IV Sub LP (the "BioPharma Term
Loan") under which $150 million was funded.

As of December 31, 2019, we had $271.7 million in cash, cash equivalents and
short-term investments.  As of December 31, 2018, we had $160.1 million in cash,
cash equivalents and short-term investments. We generated cash of $113.8 million
from operations in 2019. This consisted primarily of the net income for the year
of $130.1 million and non-cash charges of $28.6 million related to impairment of
intangible assets, $14.2 million related to stock-based compensation expense and
$5.1 million related to depreciation and amortization expense, including
amortization of debt issuance costs. Partially offsetting this was a net
increase in operating assets, net of liabilities of $58.3 million. Investing
activities used cash of $155.9 million in 2019, primarily due to net purchases
of investments of $155.8 million. Financing activities used cash of
$2.2 million, primarily to repay $1.3 million of debt borrowings and to
repurchase $0.9 million of common stock.

Facilities. In August 2018, our subsidiary Lex-Gen Woodlands, L.P. entered into
a term loan and security agreement refinancing the previously existing mortgage
on our facilities in The Woodlands, Texas. The loan agreement provides for a
$12.9 million mortgage on the property and has a two-year term with a 10-year
amortization. The mortgage loan bears interest at a rate per annum equal to the
greater of (a) the 30-day LIBOR rate plus 5.5% and (b) 7.5% and provides for a
balloon payment of $10.3 million due in August 2020.

In January 2020, Lex-Gen Woodlands, L.P. entered into a real estate purchase and
sale agreement under which we agreed to sell our facilities in The Woodlands,
Texas for a purchase price of $15.0 million. Such sale is subject to normal and
customary closing conditions, including a study period, which extends until
April 9, 2020, during which the purchaser may
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conduct inspections, analyses and other studies of the property and may
terminate the agreement in its discretion. Such sale is also subject to the
negotiation and execution by the parties of a leaseback agreement for a period
of up to six months with respect to a portion of the property concurrently with
closing.

In March 2015, our subsidiary Lexicon Pharmaceuticals (New Jersey), Inc. leased
a 25,000 square-foot office space in Basking Ridge, New Jersey. The term of the
lease extends from June 1, 2015 through December 31, 2022, and provides for
escalating yearly base rent payments starting at $482,000 and increasing to
$646,000 in the final year of the lease.

Including the lease and debt obligations described above, we had incurred the following contractual obligations as of December 31, 2019:

Payments due by period (in millions)


                                                                 Less than 1
Contractual Obligations                      Total                   year            2-3 years         4-5 years           More than 5 years
Debt                                     $   248.6               $    11.1          $  237.5          $       -          $            -
Interest payment obligations                  50.0                    18.9              31.1                  -                       -

Total                                    $   298.6               $    30.0          $  268.6          $       -          $            -



Our future capital requirements will be substantial and will depend on many
factors, including our ability to successfully commercialize XERMELO in the
United States and the amount of revenues generated from such commercialization
efforts; Ipsen's ability to successfully commercialize XERMELO outside of the
United States and Japan and our receipt of any milestone payments and royalties;
the success of our ongoing nonclinical and clinical development efforts and
ability to obtain necessary regulatory approvals of the drug candidates which
are the subject of such efforts; our success in establishing new collaborations
and licenses, including for the development and commercialization of
sotagliflozin; the amount and timing of our research, development and
commercialization expenditures; the resources we devote to developing and
supporting our products and other factors. Our capital requirements will also be
affected by any expenditures we make in connection with license agreements and
acquisitions of and investments in complementary technologies and businesses. We
expect to continue to devote substantial capital resources to continue
commercializing XERMELO in the United States; to successfully complete our
nonclinical and clinical development efforts with respect to telotristat ethyl,
sotagliflozin, LX9211 and our other drug candidates; and for other general
corporate activities. We believe that our current unrestricted cash and
investment balances and cash and revenues we expect to derive from strategic and
other collaborations and other sources will be sufficient to fund our operations
for at least the next 12 months. During or after this period, if cash generated
by operations is insufficient to satisfy our liquidity requirements, we will
need to sell additional equity or debt securities or obtain additional credit
arrangements. Additional financing may not be available on terms acceptable to
us or at all. The sale of additional equity or convertible debt securities may
result in additional dilution to our stockholders.

Disclosure about Market Risk



We are exposed to limited market and credit risk on our cash equivalents which
have maturities of three months or less at the time of purchase. We maintain a
short-term investment portfolio which consists of U.S. Treasury bills and
corporate debt securities that mature three to 12 months from the time of
purchase, which we believe are subject to limited market and credit risk. We
currently do not hedge interest rate exposure or hold any derivative financial
instruments in our investment portfolio.

We had approximately $271.7 million in cash and cash equivalents and short-term
investments as of December 31, 2019. We believe that the working capital
available to us will be sufficient to meet our cash requirements for at least
the next 12 months. We are not subject to interest rate sensitivity on our
outstanding Convertible Notes and our BioPharma Term Loan as each generally have
a fixed rate of 5.25% and 9% per annum, respectively. The Convertible Notes
interest is payable in cash semi-annually in arrears and matures in December
2021, unless earlier converted or repurchased in accordance with their terms.
The BioPharma Term Loan bears interest payable quarterly in arrears, and
provides for interest-only payments followed by payment of principal at maturity
in December 2022.

We have operated primarily in the United States and substantially all sales to
date have been made in U.S. dollars. Accordingly, we have not had any material
exposure to foreign currency rate fluctuations.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk



See "Disclosure about Market Risk" under "Item 7. Management's Discussion and
Analysis of Financial Condition and Results of Operations" for quantitative and
qualitative disclosures about market risk.
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