Shareholders' Deficit - Narrative (Details) - USD ($)		3 Months Ended
	Jun. 04, 2019	Jun. 30, 2019	Jun. 30, 2020	Apr. 30, 2018
Public Offering
Subsidiary, Sale of Stock [Line Items]
Number of shares issued (in shares)	17,424,243
Price of shares (in USD per share)	$ 8.25
Net proceeds from sale of shares	$ 134,500,000
Cowen and Company, LLC | Private Placement
Subsidiary, Sale of Stock [Line Items]
Aggregate offering price				$ 100,000,000.0
Number of shares issued (in shares)		106,494
Price of shares (in USD per share)		$ 24.65
Net proceeds from sale of shares		$ 2,500,000
Remaining capacity in offering program			$ 10,400,000