Condensed consolidated statements of stockholders' equity (unaudited) - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Accumulated deficit
Beginning balance (in shares) at Mar. 31, 2022		51,524,307
Beginning balance at Mar. 31, 2022	$ 312,429	$ 515	$ 795,443	$ (483,529)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	14,469			14,469
Stock-based compensation	6,549		6,549
Exercise of stock options and vesting of restricted stock (in shares)		558,336
Exercise of stock options and vesting of restricted stock	2	$ 2
Ending balance (in shares) at Jun. 30, 2022		52,082,643
Ending balance at Jun. 30, 2022	333,449	$ 517	801,992	(469,060)
Beginning balance (in shares) at Mar. 31, 2023		53,571,577
Beginning balance at Mar. 31, 2023	411,017	$ 535	832,481	(421,999)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	52,977			52,977
Stock-based compensation	7,223		7,223
Exercise of stock options and vesting of restricted stock (in shares)		754,953
Exercise of stock options and vesting of restricted stock	485	$ 8	477
Ending balance (in shares) at Jun. 30, 2023		54,326,530
Ending balance at Jun. 30, 2023	$ 471,702	$ 543	$ 840,181	$ (369,022)