CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Cumulative adjustment from adoption of recent accounting pronouncements (refer to Note 1)	Cumulative adjustment from adoption of recent accounting pronouncements (refer to Note 1) Retained Earnings
Beginning balance (in shares) at Mar. 31, 2019		29,141,000
Beginning balance at Mar. 31, 2019	$ 1,045,130	$ 291	$ 178,227	$ 889,266	$ (22,654)	$ (1,069)	$ (1,069)
Increase (Decrease) in Stockholders' Equity
Stock-based compensation (in shares)		1,000
Stock-based compensation	3,424		3,424
Shares issued upon vesting (in shares)		4,000
Shares issued upon vesting	0
Exercise of stock options (in shares)		46,000
Exercise of stock options	2,773	$ 1	2,772
Shares withheld for taxes	(374)		(374)
Repurchases of common stock (in shares)		(227,000)
Repurchases of common stock	(35,005)	$ (2)		(35,003)
Net income (loss)	(19,351)			(19,351)
Total other comprehensive income	(249)				(249)
Ending balance (in shares) at Jun. 30, 2019		28,965,000
Ending balance at Jun. 30, 2019	995,279	$ 290	184,049	833,843	(22,903)
Beginning balance (in shares) at Mar. 31, 2020		27,999,000
Beginning balance at Mar. 31, 2020	1,140,120	$ 280	191,451	973,948	(25,559)
Increase (Decrease) in Stockholders' Equity
Stock-based compensation (in shares)		1,000
Stock-based compensation	3,618		3,618
Shares issued upon vesting (in shares)		1,000
Shares issued upon vesting	0
Exercise of stock options (in shares)		4,000
Exercise of stock options	247	$ 0	247
Shares withheld for taxes	$ (90)		(90)
Repurchases of common stock (in shares)	0
Net income (loss)	$ (7,973)			(7,973)
Total other comprehensive income	1,006				1,006
Ending balance (in shares) at Jun. 30, 2020		28,005,000
Ending balance at Jun. 30, 2020	$ 1,136,928	$ 280	$ 195,226	$ 965,975	$ (24,553)