Consolidated Statements of Operations - Scenario, Unspecified [Domain] - USD ($) shares in Thousands	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Net sales	$ 33,809,000	$ 28,178,000	$ 27,459,000
Cost of sales	19,343,000	16,989,000	16,575,000
Gross profit	14,466,000	11,189,000	10,884,000
Operating expenses:
General and administrative	7,864,000	6,415,000	4,680,000
Sales and marketing	5,667,000	4,469,000	3,675,000
Research and development	517,000	469,000	258,000
Loss on disposal of equipment and leasehold improvements	127,000	46,000	46,000
Total operating expense	14,144,000	11,399,000	8,659,000
Income (loss) from operations	322,000	(210,000)	2,225,000
Other expense:
Interest expense, net	$ (93,000)	$ (118,000)	(60,000)
Loss on extinguishment of debt			(51,000)
Total other expense, net	$ (93,000)	$ (118,000)	(111,000)
Income before income tax (expense) benefit	229,000	(328,000)	2,114,000
Income tax (expense) benefit	(253,000)	(92,000)	2,050,000
Net (loss) income	$ (24,000)	$ (420,000)	$ 4,164,000
Net (loss) income per share:
Basic (in dollars per share)	$ 0	$ (0.08)	$ 0.76
Diluted (in dollars per share)	$ 0	$ (0.08)	$ 0.74
Shares used in calculation of (loss) net income per share:
Basic (in shares)	5,517	5,478	5,455
Diluted (in shares)	5,517	5,478	5,655