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, 2018
Jun. 04, 2018
Sep. 30, 2017
Document and Entity Information      
Entity Registrant Name CAPSTONE TURBINE Corp    
Entity Central Index Key 0001009759    
Document Type 10-K    
Document Period End Date Mar. 31, 2018    
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 Smaller Reporting Company    
Entity Public Float     $ 30.6
Entity Common Stock, Shares Outstanding   63,508,244  
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY