Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v3.24.1.1.u2
Document and Entity Information - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Mar. 31, 2023
Jun. 10, 2024
Sep. 30, 2022
Cover [Abstract]      
Entity Central Index Key 0001009759    
Document Type 10-K    
Document Period End Date Mar. 31, 2023    
Document Annual Report true    
Document Transition Report false    
Entity File Number 001-15957    
Entity Registrant Name CAPSTONE GREEN ENERGY HOLDINGS, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 20-1514270    
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    
Title of 12(b) Security Common Stock, par value $0.001 per share    
Entity Listing, Par Value Per Share $ 0.001    
No Trading Symbol Flag true    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status No    
Entity Interactive Data Current No    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] true    
Document Financial Statement Restatement Recovery Analysis [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 32.9
Entity Common Stock, Shares Outstanding   18,546,649  
Current Fiscal Year End Date --03-31    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Amendment Flag false    
Auditor Name Marcum LLP    
Auditor Firm ID 688    
Auditor Location Los Angeles, CA