Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Net sales	$ 184,593	$ 114,188
Cost of sales	129,088	66,792
Gross profit	55,505	47,396
Operating expenses:
Selling and marketing	21,300	12,446
General and administrative	11,523	9,315
Research and development	4,815	3,728
Loss on disposal group	0	29,013
Total operating expenses	37,638	54,502
Operating income (loss)	17,867	(7,106)
Other expense:
Interest income	21	1
Interest expense	(314)	(338)
Other, net	(120)	115
Total other expense, net	(413)	(222)
Income (loss) from continuing operations before income taxes	17,454	(7,328)
Income tax expense (benefit)	3,438	(2,342)
Income (loss) from continuing operations	14,016	(4,986)
Discontinued operations:
Loss from discontinued operations before income taxes	(126)	(29)
Income tax expense of discontinued operations	6	95
Loss from discontinued operations	(132)	(124)
Net income (loss)	$ 13,884	$ (5,110)
Earnings Per Share, Basic [Abstract]
Basic income (loss) per share from continuing operations (in dollars per share)	$ 0.46	$ (0.17)
Basic loss per share from discontinued operation (in dollars per share)	(0.01)	0
Basic net income (loss) per share (in dollars per share)	0.45	(0.17)
Earnings Per Share, Diluted [Abstract]
Diluted income (loss) per share from continuing operations (in dollars per share)	0.43	(0.17)
Diluted loss per share from discontinued operation (in dollars per share)	0	0
Diluted net income (loss) per share (in dollars per share)	$ 0.43	$ (0.17)
Shares used in per share calculations:
Basic (in shares)	30,697	29,909
Diluted (in shares)	32,508	29,909