Stock-Based Compensation - Stock Options (Details)	6 Months Ended
	Sep. 30, 2023 plan $ / shares shares
Stock-Based Compensation
Number of stock incentive plans | plan	2
Vested and expected to vest at the end of the period (in shares)	5,900,000
Stock options
Shares
Options outstanding at the beginning of the period (in shares)	6,287,000
Granted (in shares)	266,000
Exercised (in shares)	(104,000)
Forfeited (in shares)	(403,000)
Expired (in shares)	(195,000)
Options outstanding at the end of the period (in shares)	5,851,000
Weighted- Average Exercise Price
Options outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 4.11
Granted (in dollars per share) | $ / shares	4.06
Exercised (in dollars per share) | $ / shares	3.22
Forfeited (in dollars per share) | $ / shares	4.04
Expired (in dollars per share) | $ / shares	4.85
Options outstanding at the end of the period (in dollars per share) | $ / shares	$ 4.10
2016 Plan
Stock-Based Compensation
Authorized for future issuance under stock incentive plans (in shares)	1,700,000