Share-Based Compensation - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended						3 Months Ended		123 Months Ended
	Feb. 28, 2023	May 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Feb. 28, 2021	Mar. 31, 2020	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Oct. 31, 2019	Apr. 30, 2016
Stock options
Stock Option and Compensation Plans
Unrecognized share-based compensation costs for option awards, net of estimated forfeitures							$ 72,500		$ 72,500
Expected weighted average period to recognize share-based compensation costs (in years)							3 years 1 month 6 days
Restricted stock units
Stock Option and Compensation Plans
Expected weighted average period to recognize share-based compensation costs (in years)							3 years 1 month 6 days
Unrecognized compensation costs, net of estimated forfeitures							$ 33,900		$ 33,900
Employee stock purchase plan
Stock Option and Compensation Plans
Number of initial shares reserved for issuance under the Plan (in shares)											1,000,000
Number of shares available for future purchase (in shares)							676,853		676,853
Common stock issued (in shares)							35,541	15,095
Proceeds from stock plans							$ 532	$ 184
2013 Plan
Stock Option and Compensation Plans
Increase in number of shares available under the Plan (in shares)							2,542,000		18,166,000
Number of shares of common stock available for issuance under the Plan (in shares)							2,646,000		2,646,000
2019 Inducement Plan | Stock options
Stock Option and Compensation Plans
Increase in number of shares available under the Plan (in shares)	2,000,000	1,000,000	1,000,000	1,000,000	600,000	1,000,000
Number of shares of common stock available for issuance under the Plan (in shares)							1,995,000		1,995,000
Number of initial shares reserved for issuance under the Plan (in shares)										1,000,000