Quarterly report pursuant to Section 13 or 15(d)

Debt - Interest Income / (Expense) (Details)

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Debt - Interest Income / (Expense) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]        
Interest income $ 59 $ (194) $ 118 $ (648)
Amortization of debt discount and debt issuance costs     $ 0 251
Interest expense   194   648
Convertible notes        
Debt Instrument [Line Items]        
Interest expense, debt   131   397
Amortization of debt discount and debt issuance costs   $ 63   $ 251