Capstone Green Energy : XBRL Q3 2022

Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - $ / shares	9 Months Ended
Document Information [Line Items]
Entity Central Index Key	0001009759
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	001-15957
Entity Registrant Name	Capstone Green Energy Corporation
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	95-4180883
Entity Address, Address Line One	16640 Stagg Street
Entity Address, City or Town	Van Nuys
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	91406
City Area Code	818
Local Phone Number	734-5300
Entity Listing, Par Value Per Share	$ 0.001
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		15,265,722
Current Fiscal Year End Date	--03-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Amendment Flag	false
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock, par value $.001 per share
Trading Symbol	CGRN
Security Exchange Name	NASDAQ
Series B Junior Participating Preferred Stock
Document Information [Line Items]
Title of 12(b) Security	Series B Junior Participating Preferred Stock Purchase Rights
No Trading Symbol Flag	true