Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
NET SALES	$ 10,044,000	$ 9,150,000	$ 24,143,000	$ 26,014,000
COST OF SALES	5,928,000	4,910,000	15,906,000	14,551,000
Gross profit	4,116,000	4,240,000	8,237,000	11,463,000
OPERATING EXPENSES:
General and administrative	1,337,000	1,368,000	4,190,000	4,132,000
Sales and marketing	2,068,000	1,620,000	5,088,000	4,549,000
Research and development	216,000	142,000	635,000	433,000
Total operating expenses	3,621,000	3,130,000	9,913,000	9,114,000
Income (loss) from operations	495,000	1,110,000	(1,676,000)	2,349,000
Interest expense, net	(134,000)	(130,000)	(414,000)	(371,000)
Income(loss) before income taxes	361,000	980,000	(2,090,000)	1,978,000
INCOME TAX EXPENSE (BENEFIT)	73,000	(127,000)	33,000	(105,000)
NET INCOME (LOSS)	$ 288,000	$ 1,107,000	$ (2,123,000)	$ 2,083,000
NET INCOME (LOSS) PER SHARE:
Basic (in dollars per share)	$ 0.05	$ 0.19	$ (0.37)	$ 0.36
Diluted (in dollars per share)	$ 0.05	$ 0.19	$ (0.37)	$ 0.36
SHARES USED IN CALCULATION OF NET INCOME (LOSS) PER SHARE:
Basic (in shares)	5,836	5,749	5,809	5,714
Diluted (in shares)	5,862	5,831	5,809	5,774