Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenue:
Product sales	$ 1,898	$ 2,045
Royalties	2,424	2,569
Total revenue	4,322	4,614
Cost of revenue:
Product sales	1,205	1,062
Total cost of revenue	1,205	1,062
Gross profit	3,117	3,552
Operating expenses:
Selling, marketing and product support	2,720	2,050
General and administrative	1,372	1,370
Research and development	1,816	1,131
Investigation matter	116	1,609
Restructuring	460
Amortization of intangible assets	389	341
Total operating expenses	6,873	6,501
Loss from operations	(3,756)	(2,949)
Other income (expense), net	(1)	2
Loss before income taxes	(3,757)	(2,947)
Income tax benefit		(1,494)
Net loss	$ (3,757)	$ (1,453)
Net loss per share:
Basic	$ (0.76)	$ (0.30)
Diluted	$ (0.76)	$ (0.30)
Weighted average number of common shares outstanding:
Basic	4,976	4,910
Diluted	4,976	4,910