Quarterly report pursuant to Section 13 or 15(d)

Debt - Interest Expense (Details)

v3.10.0.1
Debt - Interest Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Debt Instrument [Line Items]        
Amortization of debt discount and debt issuance costs     $ 188 $ 680
Interest expense $ 135 $ 662 454 1,369
Convertible notes        
Debt Instrument [Line Items]        
Interest expense, net 108 335 266 689
Amortization of debt discount and debt issuance costs $ 27 $ 327 $ 188 $ 680