Financing Arrangements - Outstanding Debt Obligations (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Debt Instrument [Line Items]
Principal amount		$ 100,000
End of term charge		2,620
Less: unamortized debt issuance costs		(3,238)
Loan payables less unamortized debt issuance costs		99,382
Less: current maturities	$ 0	(6,142)
Long-term debt, net of current maturities and unamortized debt issuance costs	$ 0	93,240
Line of Credit | NovaQuest
Debt Instrument [Line Items]
Principal amount		60,000
End of term charge		0
Less: unamortized debt issuance costs		(756)
Loan payables less unamortized debt issuance costs		59,244
Less: current maturities		0
Long-term debt, net of current maturities and unamortized debt issuance costs		59,244
Term Loan | Hercules
Debt Instrument [Line Items]
Principal amount		40,000
End of term charge		2,620
Less: unamortized debt issuance costs		(2,482)
Loan payables less unamortized debt issuance costs		40,138
Less: current maturities		(6,142)
Long-term debt, net of current maturities and unamortized debt issuance costs		$ 33,996