Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 7,896	$ (3,686)	$ (3,445)	$ (21,106)
Other comprehensive income (loss):
Cumulative translation adjustments	(52)	940	(33)	1,893
Changes in market value of investments:
Changes in unrealized losses, net of tax benefit of $0, ($10), ($2) and ($33), respectively	0	(33)	(5)	(107)
Total net change in market value of investments	0	(33)	(5)	(107)
Changes in market value of derivatives:
Changes in market value of derivatives, net of (benefit) taxes of ($9), $55, $30 and $59, respectively	(33)	181	97	188
Reclassification adjustment for net gains (losses) included in net income (loss), net of taxes (benefit) of $9,($32), ($15) and ($22), respectively	31	(105)	(50)	(72)
Total net change in market value of derivatives	(2)	76	47	116
Other comprehensive income (loss)	(54)	983	9	1,902
Total comprehensive income (loss)	$ 7,842	$ (2,703)	$ (3,436)	$ (19,204)