Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenue:
Product sales	$ 12,564	$ 17,475	$ 19,162
Royalties	12,399	13,046	12,519
Total revenue	24,963	30,521	31,681
Cost of revenue (exclusive of amortization shown below):
Product sales	6,706	8,769	7,799
Restructuring		448
Total cost of revenue	6,706	9,217	7,799
Gross profit	18,257	21,304	23,882
Operating expenses:
Selling, marketing and product support	7,289	10,609	9,807
General and administrative	5,167	6,315	4,372
Research and development	4,135	4,424	3,630
Amortization of intangible assets	1,622	1,650	1,218
Restructuring	430	287
Goodwill impairment	3,175	11,685
Acquisition related expenses (income)		(618)	817
Total operating expenses	21,818	34,352	19,844
Income (loss) from operations	(3,561)	(13,048)	4,038
Other income (expense), net	29	9	(123)
Income (loss) before income taxes	(3,532)	(13,039)	3,915
Income tax expense (benefit)	(180)	(3,022)	910
Net income (loss)	$ (3,352)	$ (10,017)	$ 3,005
Net income (loss) per share:
Basic	$ (0.69)	$ (2.07)	$ 0.66
Diluted	$ (0.69)	$ (2.07)	$ 0.64
Weighted average number of common shares outstanding:
Basic	4,886	4,834	4,555
Diluted	4,886	4,834	4,667