Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenue	$ 140,285	$ 127,287	$ 117,917
Cost of products sold	37,927	35,723	34,031
Gross profit	102,358	91,564	83,886
Operating expenses:
Selling, general and administrative	82,254	70,502	66,665
Research, development and other technology	16,846	17,729	14,900
Acquisition related costs	311	0	0
Settlement costs license agreement dispute	0	1,821	0
Litigation charge	0	596	0
Federal investigation legal and accrued indemnification costs	0	(370)	6,798
Employee termination and lease abandonment costs	0	0	1,630
Asset impairment charge	0	0	939
Total operating expenses	99,411	90,278	90,932
Operating income (loss)	2,947	1,286	(7,046)
Other income (expense):
Litigation-related interest expense	0	(230)	0
Interest income, net	8	81	223
Foreign currency transaction gain (loss)	(5)	(62)	4
Other, net	10	50	(12)
Total other income (expense)	13	(161)	215
Income (loss) before income taxes	2,960	1,125	(6,831)
Income tax expense	734	231	6,232
Net income (loss)	2,226	894	(13,063)
Income (loss) per share:
Net income (loss) per share, basic	$ 0.06	$ 0.03	$ (0.39)
Net income (loss) per share, diluted	$ 0.06	$ 0.03	$ (0.39)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	97	(270)	(422)
Unrealized loss on short term investment securities	0	0	(43)
Comprehensive income (loss), net of tax	$ 2,323	$ 624	$ (13,528)
Weighted average common shares outstanding:
Basic	34,376,847	33,458,287	33,091,262
Diluted	35,766,970	34,370,124	33,091,262