CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (UNAUDITED) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
REVENUE
Product sales	$ 21,313	$ 20,968	$ 42,292	$ 40,706
License and fee income	643	568	1,247	1,083
REVENUE, Total	21,956	21,536	43,539	41,789
COST OF SALES	13,942	12,828	26,916	25,114
GROSS PROFIT	8,014	8,708	16,623	16,675
OPERATING EXPENSES
Selling, general and administrative	5,378	5,546	11,279	11,393
Amortization of purchased intangibles	1,006	698	1,861	1,396
Research and development	312	460	589	995
Loss on sale of equipment	3	1	3	2
OPERATING EXPENSES, Total	6,699	6,705	13,732	13,786
EARNINGS FROM OPERATIONS	1,315	2,003	2,891	2,889
OTHER INCOME (EXPENSE)
Interest income	36	43	74	83
Interest expense	(155)	(186)	(319)	(363)
Other	1	2	2	3
OTHER INCOME (EXPENSE), Total	(118)	(141)	(243)	(277)
EARNINGS BEFORE INCOME TAXES	1,197	1,862	2,648	2,612
Income tax expense	359	677	876	969
NET EARNINGS	838	1,185	1,772	1,643
EARNINGS PER SHARE:
Basic (in dollars per share)	$ 0.02	$ 0.04	$ 0.05	$ 0.05
Diluted (in dollars per share)	$ 0.02	$ 0.04	$ 0.05	$ 0.05
WEIGHTED AVERAGE SHARES:
Basic (in shares)	33,655	33,418	33,594	33,378
Diluted (in shares)	34,204	33,753	34,099	33,707
COMPREHENSIVE EARNINGS
Net earnings	838	1,185	1,772	1,643
Other comprehensive earnings, net of taxes
Reclassification adjustment for gain included in net earnings	(1)		(1)
Unrealized gains on securities arising during the period	48	13	48	19
Total other comprehensive earnings	47	13	47	19
Total comprehensive earnings	$ 885	$ 1,198	$ 1,819	$ 1,662