Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Gross unrecognized tax benefits
Gross unrecognized tax benefits at beginning of year	$ 1,079	$ 952	$ 687
Increases for tax positions taken in prior years	0	35	101
Decreases for tax positions taken in prior years	(29)	0	0
Increases for tax positions taken in the current year	159	104	180
Lapse in statute of limitations	(11)	(12)	(16)
Gross unrecognized tax benefits at end of year	$ 1,198	$ 1,079	$ 952