Quarterly report pursuant to Section 13 or 15(d)

Leases - Supplemental Balance Sheet Information (Details)

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Leases - Supplemental Balance Sheet Information (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Apr. 01, 2019
Leases    
Operating lease right-of-use assets $ 5,209 $ 5,500
Operating lease right-of-use assets, balance sheet location us-gaap:OtherAssetsNoncurrent  
Operating lease liability, current $ 438  
Operating lease liability, current, balance sheet location cpst:NotesPayableAndCapitalLeaseObligationsCurrent  
Operating lease liability, non-current $ 5,051  
Operating lease liability, non-current, balance sheet location cpst:NotesPayableAndCapitalLeaseObligationsNoncurrent  
Total operating lease liabilities $ 5,489 $ 5,800