Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
NET SALES	$ 8,055,000	$ 9,862,000	$ 16,864,000	$ 17,184,000
COST OF SALES	4,435,000	5,977,000	9,641,000	10,478,000
Gross profit	3,620,000	3,885,000	7,223,000	6,706,000
OPERATING EXPENSES:
General and administrative	1,412,000	2,016,000	2,764,000	3,726,000
Sales and marketing	1,440,000	1,470,000	2,929,000	3,025,000
Research and development	149,000	152,000	291,000	318,000
Total operating expenses	3,001,000	3,638,000	5,984,000	7,069,000
Income (loss) from operations	619,000	247,000	1,239,000	(363,000)
Interest expense, net	(133,000)	(122,000)	(241,000)	(253,000)
Income (loss) before income taxes	486,000	125,000	998,000	(616,000)
INCOME TAX EXPENSE (BENEFIT)	11,000	26,000	21,000	(24,000)
NET INCOME (LOSS)	$ 475,000	$ 99,000	$ 977,000	$ (592,000)
NET INCOME (LOSS) PER SHARE:
Basic (in dollars per share)	$ 0.08	$ 0.02	$ 0.17	$ (0.10)
Diluted (in dollars per share)	$ 0.08	$ 0.02	$ 0.17	$ (0.10)
SHARES USED IN CALCULATION OF NET INCOME (LOSS) PER SHARE:
Basic (in shares)	5,709	5,657	5,697	5,645
Diluted (in shares)	5,771	5,727	5,743	5,645