Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Net sales	$ 31,899	$ 30,202	$ 34,115
Cost of sales	19,199	19,736	20,744
Gross profit	12,700	10,466	13,371
Operating expenses:
General and administrative	5,281	5,718	4,956
Sales and marketing	5,758	6,822	6,438
Research and development	608	923	563
Total operating expense	11,647	13,463	11,957
Income (loss) from operations	1,053	(2,997)	1,414
Other expense:
Interest expense, net	(657)	(582)	(499)
Total other expense, net	(657)	(582)	(499)
Income (loss) before income taxes	396	(3,579)	915
Income tax (expense) benefit	(9)	(17)	110
Net income (loss)	$ 387	$ (3,596)	$ 1,025
Net income (loss) per share:
Basic (in dollars per share)	$ 0.06	$ (0.62)	$ 0.18
Diluted (in dollars per share)	$ 0.06	$ (0.62)	$ 0.18
Shares used in calculation of net income (loss) per share:
Basic (in shares)	5,956	5,819	5,709
Diluted (in shares)	5,961	5,819	5,781