Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Mar. 31, 2020	$ 92,925	$ 1,781	$ 92,456	$ (1,312)
Balance, shares at Mar. 31, 2020		29,817
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(5,110)		(5,110)
Unrealized loss on marketable securities, net of income tax benefit	0
Foreign currency translation adjustment, including income tax expense (benefit)	353			353
Stock-based compensation expense	865	$ 865	0
Common stock issued under equity compensation plan, net of shares withheld for tax payments (in shares)		87
Common stock issued under equity compensation plan, net of shares withheld for tax payments	0	$ 0
Common stock issued under employee stock purchase plan, shares		63
Common stock issued under employee stock purchase plan	83	$ 83
Balance, shares at Jun. 30, 2020		29,967
Ending balance at Jun. 30, 2020	89,116	$ 2,729	87,346	(959)
Beginning balance at Mar. 31, 2021	182,545	$ 2,176	180,524	(155)
Balance, shares at Mar. 31, 2021		30,576
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	13,884		13,884
Unrealized loss on marketable securities, net of income tax benefit	0			0
Foreign currency translation adjustment, including income tax expense (benefit)	217			217
Stock-based compensation expense	1,225	$ 1,225	0
Common stock issued under equity compensation plan, net of shares withheld for tax payments (in shares)		201
Common stock issued under equity compensation plan, net of shares withheld for tax payments	(1,259)	$ (1,259)
Common stock issued under employee stock purchase plan, shares		17
Common stock issued under employee stock purchase plan	269	$ 269
Balance, shares at Jun. 30, 2021		30,794
Ending balance at Jun. 30, 2021	$ 196,881	$ 2,411	$ 194,408	$ 62