Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue:
Product sales	$ 4,514	$ 4,341	$ 9,063	$ 10,657
Royalties	2,626	3,400	8,337	9,167
Total revenue	7,140	7,741	17,400	19,824
Cost of revenue:
Product sales	2,557	2,944	5,437	6,511
Total cost of revenue	2,557	2,944	5,437	6,511
Gross profit	4,583	4,797	11,963	13,313
Operating expenses:
Selling, marketing and product support	2,139	2,792	7,328	7,545
General and administrative	1,317	1,464	4,187	4,426
Research and development	1,297	1,651	4,536	4,138
Investigation matter		476	152	3,214
Amortization of intangible assets	390	328	1,172	1,009
Impairment of investment	150		150
Restructuring			460
Total operating expenses	5,293	6,711	17,985	20,332
Loss from operations	(710)	(1,914)	(6,022)	(7,019)
Other income (expense), net	12	1	26	(1)
Loss before income taxes	(698)	(1,913)	(5,996)	(7,020)
Income tax expense (benefit)	(145)	22	(155)	(1,887)
Net loss	$ (553)	$ (1,935)	$ (5,841)	$ (5,133)
Net loss per share:
Basic	$ (0.11)	$ (0.39)	$ (1.17)	$ (1.04)
Diluted	$ (0.11)	$ (0.39)	$ (1.17)	$ (1.04)
Weighted average number of common shares outstanding:
Basic	4,985	4,970	4,980	4,949
Diluted	4,985	4,970	4,980	4,949