CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (UNAUDITED) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
REVENUE
Product sales	$ 19,286	$ 20,500	$ 61,578	$ 61,206
License and fee income	630	562	1,877	1,645
REVENUE, Total	19,916	21,062	63,455	62,851
COST OF SALES	12,472	12,293	39,388	37,407
GROSS PROFIT	7,444	8,769	24,067	25,444
OPERATING EXPENSES
Selling, general and administrative	5,338	5,651	16,617	17,044
Amortization of purchased intangibles	665	698	2,526	2,094
Research and development	281	380	870	1,375
Loss on sale of equipment		2	3	4
OPERATING EXPENSES, Total	6,284	6,731	20,016	20,517
EARNINGS FROM OPERATIONS	1,160	2,038	4,051	4,927
OTHER INCOME (EXPENSE)
Interest income	28	39	102	122
Interest expense	(163)	(166)	(482)	(529)
Other	6	1	8	4
OTHER INCOME (EXPENSE), Total	(129)	(126)	(372)	(403)
EARNINGS BEFORE INCOME TAXES	1,031	1,912	3,679	4,524
Income tax expense	341	771	1,217	1,740
NET EARNINGS	690	1,141	2,462	2,784
EARNINGS PER SHARE:
Basic (in dollars per share)	$ 0.02	$ 0.03	$ 0.08	$ 0.08
Diluted (in dollars per share)	$ 0.02	$ 0.03	$ 0.07	$ 0.08
WEIGHTED AVERAGE SHARES:
Basic (in shares)	29,752	33,442	32,304	33,400
Diluted (in shares)	30,383	33,727	32,911	33,766
COMPREHENSIVE EARNINGS
Net earnings	690	1,141	2,462	2,784
Other comprehensive earnings, net of taxes
Reclassification adjustment for gain included in net earnings	(7)		(8)
Unrealized gain (loss) on securities	29	(62)	77	(43)
Total other comprehensive earnings	22	(62)	69	(43)
Total comprehensive earnings	$ 712	$ 1,079	$ 2,531	$ 2,741