Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Consolidated Statements of Operations
Total revenues	$ 13,994	$ 14,881	$ 45,802	$ 43,166
Cost of revenues	8,843	9,417	28,316	25,828
Gross profit	5,151	5,464	17,486	17,338
Operating expenses:
Selling, general and administrative	4,382	4,371	13,509	13,501
Research and development	902	868	2,369	2,476
Amortization of intangible assets	161	141	483	343
Change in fair value of contingent consideration	133	(281)	(188)	(639)
Total operating expenses	5,578	5,099	16,173	15,681
Operating income (loss)	(427)	365	1,313	1,657
Non-operating income (expense):
Other income, net	1	3	9	4
Interest income (expense), net	12	(13)	(2)	(64)
Income (loss) from continuing operations before income taxes	(414)	355	1,320	1,597
Benefit (provision) for income taxes	120	263	(475)	(715)
Income (loss) from continuing operations	(294)	618	845	882
Gain on sale of discontinued operation, net of tax	1,391	129	1,478	1,244
Income from discontinued operation, net of tax				28
Net income	$ 1,097	$ 747	$ 2,323	$ 2,154
Income (loss) per share from continuing operations - basic and diluted (in dollars per share)	$ (0.01)	$ 0.02	$ 0.03	$ 0.03
Gain per share from sale of discontinued operation - basic and diluted (in dollars per share)	$ 0.04	$ 0.00	$ 0.04	$ 0.04
Income per share from discontinued operation - basic and diluted (in dollars per share)	$ 0.00	$ 0.00	$ 0.00	$ 0.00
Net income per share - basic and diluted (in dollars per share)	$ 0.03	$ 0.02	$ 0.07	$ 0.06
Shares used in basic per share calculations (in shares)	33,532	34,217	33,657	34,337
Shares used in diluted per share calculations (in shares)	33,641	34,271	33,759	34,443