CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
CONSOLIDATED STATEMENTS OF OPERATIONS
Net sales	$ 27,581	$ 24,631	$ 16,827
Cost of sales	16,623	14,857	10,486
Gross profit	10,958	9,774	6,341
Operating expenses:
General and administrative	4,680	4,014	2,822
Sales and marketing	3,675	2,480	1,986
Research and development	258	320	282
Loss on disposal of equipment and leasehold improvements	46	57	22
Total operating expense	8,659	6,871	5,112
Income from operations	2,299	2,903	1,229
Other income (expense):
Loss on extinguishment of debt	(51)
Interest expense, net	(60)	(55)	(70)
Other income, net		5	4
Total other expense, net	(111)	(50)	(66)
Income before income tax benefit (expense)	2,188	2,853	1,163
Income tax benefit (expense)	2,021	779	567
Net income	$ 4,209	$ 3,632	$ 1,730
Net income per share:
Basic (in dollars per share)	$ 0.77	$ 0.67	$ 0.32
Diluted (in dollars per share)	$ 0.74	$ 0.66	$ 0.32
Shares used in calculation of net income per share:
Basic (in shares)	5,455	5,414	5,353
Diluted (in shares)	5,655	5,534	5,413