Quarterly report pursuant to Section 13 or 15(d)

Debt - Interest Expense (Details)

v3.8.0.1
Debt - Interest Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Debt Instrument [Line Items]        
Interest expense, net $ 446 $ 725 $ 1,815 $ 2,029
Amortization of debt discount and debt issuance costs     875 969
Convertible notes        
Debt Instrument [Line Items]        
Interest expense, net 251 437 940 1,060
Amortization of debt discount and debt issuance costs $ 195 $ 288 $ 875 $ 969