Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2019
Jun. 06, 2019
Sep. 30, 2018
Document and Entity Information [Abstract]      
Entity Registrant Name CAPSTONE TURBINE Corp    
Entity Central Index Key 0001009759    
Document Type 10-K    
Document Period End Date Mar. 31, 2019    
Amendment Flag false    
Current Fiscal Year End Date --03-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 67.6
Entity Common Stock, Shares Outstanding   72,661,104  
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY