UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock, Shares	Common Stock, Additional Paid-in Capital	Treasury Stock	Retained Deficit
Shareholders' equity, beginning of period at Mar. 31, 2021	$ 58,074		$ 157,485	$ (36,240)	$ (63,171)
Shareholders' equity, beginning of period (Shares) at Mar. 31, 2021		30,805,300
Exercise of stock options for cash	101		101
Exercise of stock options for cash (shares)		24,045
Shares issued under Employee Stock Purchase Plan	3			3
Shares issued under Employee Stock Purchase Plan (shares)		496
Stock-based compensation	160		160
Stock-based compensation (shares)		171,470
Employee tax withholdings on stock-based compensation	(4)			(4)
Employee tax withholdings on stock-based compensation (shares)		(610)
Net income (loss)	2,510				2,510
Shareholders' equity, end of period at Jun. 30, 2021	60,844		157,746	(36,241)	(60,661)
Shareholders' equity, at end of period (shares) at Jun. 30, 2021		31,000,701
Shareholders' equity, beginning of period at Mar. 31, 2021	58,074		157,485	(36,240)	(63,171)
Shareholders' equity, beginning of period (Shares) at Mar. 31, 2021		30,805,300
Net income (loss)	6,169
Shareholders' equity, end of period at Sep. 30, 2021	64,732		157,975	(36,241)	(57,002)
Shareholders' equity, at end of period (shares) at Sep. 30, 2021		31,063,630
Shareholders' equity, beginning of period at Jun. 30, 2021	60,844		157,746	(36,241)	(60,661)
Shareholders' equity, beginning of period (Shares) at Jun. 30, 2021		31,000,701
Exercise of stock options for cash	18		18
Exercise of stock options for cash (shares)		7,000
Shares issued under Employee Stock Purchase Plan	1			1
Shares issued under Employee Stock Purchase Plan (shares)		327
Stock-based compensation	211		211
Stock-based compensation (shares)		55,896
Employee tax withholdings on stock-based compensation	(1)			1
Employee tax withholdings on stock-based compensation (shares)		294
Net income (loss)	3,659				3,659
Shareholders' equity, end of period at Sep. 30, 2021	64,732		157,975	(36,241)	(57,002)
Shareholders' equity, at end of period (shares) at Sep. 30, 2021		31,063,630
Shareholders' equity, beginning of period at Mar. 31, 2022	65,100		158,419	(36,239)	(57,080)
Shareholders' equity, beginning of period (Shares) at Mar. 31, 2022		31,097,872
Exercise of stock options for cash	54		54
Exercise of stock options for cash (shares)		26,646
Shares issued under Employee Stock Purchase Plan	$ 1			1
Shares issued under Employee Stock Purchase Plan (shares)	443	443
Stock-based compensation	$ 254		254
Stock-based compensation (shares)		125,744
Employee tax withholdings on stock-based compensation	(2)			(2)
Employee tax withholdings on stock-based compensation (shares)		(634)
Net income (loss)	(2,835)				(2,835)
Shareholders' equity, end of period at Jun. 30, 2022	62,572		158,727	(36,240)	(59,915)
Shareholders' equity, at end of period (shares) at Jun. 30, 2022		31,250,071
Shareholders' equity, beginning of period at Mar. 31, 2022	$ 65,100		158,419	(36,239)	(57,080)
Shareholders' equity, beginning of period (Shares) at Mar. 31, 2022		31,097,872
Shares issued under Employee Stock Purchase Plan (shares)	1,091
Net income (loss)	$ (5,166)
Shareholders' equity, end of period at Sep. 30, 2022	60,975		159,460	(36,239)	(62,246)
Shareholders' equity, at end of period (shares) at Sep. 30, 2022		31,355,911
Shareholders' equity, beginning of period at Jun. 30, 2022	62,572		158,727	(36,240)	(59,915)
Shareholders' equity, beginning of period (Shares) at Jun. 30, 2022		31,250,071
Shares issued under Employee Stock Purchase Plan	$ 1			1
Shares issued under Employee Stock Purchase Plan (shares)	648	648
Stock-based compensation	$ 733		733
Stock-based compensation (shares)		105,192
Net income (loss)	(2,331)				(2,331)
Shareholders' equity, end of period at Sep. 30, 2022	$ 60,975		$ 159,460	$ (36,239)	$ (62,246)
Shareholders' equity, at end of period (shares) at Sep. 30, 2022		31,355,911