Supplementary Financial Information - Earnings (loss) per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net income (loss) from continuing operations	$ (4,850)	$ 629
Net income (loss) from discontinued operations, net of tax	(15)	(18)
Net income (loss)	$ (4,865)	$ 611
Denominator:
Weighted average common shares used in basic computation	42,380,000	41,875,000
Dilutive stock options (in shares)	0	1,505,000
Weighted average common shares used in diluted computation	42,380,000	43,380,000
Basic:
Net income (loss) per share from continuing operations (in dollars per share)	$ (0.11)	$ 0.02
Income per share from discontinued operations (in dollars per share)	0	0
Net income (loss) per share (in dollars per share)	(0.11)	0.02
Diluted:
Net income (loss) per share from continuing operations (in dollars per share)	(0.11)	0.01
Income per share from discontinued operations (in dollars per share)	0	0
Net income (loss) per share (in dollars per share)	$ (0.11)	$ 0.01