Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues:
Design-to-silicon-yield solutions	$ 14,159	$ 13,091	$ 32,311	$ 28,010
Gainshare performance incentives	9,051	11,519	17,716	23,686
Total revenues	23,210	24,610	50,027	51,696
Costs of Design-to-silicon-yield solutions	9,888	8,847	18,692	18,552
Gross profit	13,322	15,763	31,335	33,144
Operating expenses:
Research and development	4,437	3,337	8,525	6,933
Selling, general and administrative	$ 5,216	4,661	$ 9,672	8,990
Amortization of other acquired intangible assets		$ 12		30
Restructuring charges				57
Total operating expenses	$ 9,653	$ 8,010	$ 18,197	16,010
Income from operations	3,669	7,753	13,138	17,134
Interest and other income (expense), net	52	(27)	103	(114)
Income before income taxes	3,721	7,726	13,241	17,020
Income tax provision	1,572	3,030	5,125	6,069
Net income	$ 2,149	$ 4,696	$ 8,116	$ 10,951
Net income per share:
Basic (in dollars per share)	$ 0.07	$ 0.15	$ 0.26	$ 0.36
Diluted (in dollars per share)	$ 0.07	$ 0.15	$ 0.25	$ 0.34
Weighted average common shares:
Basic (in shares)	31,522	30,590	31,429	30,533
Diluted (in shares)	32,400	31,882	32,345	31,923
Net income	$ 2,149	$ 4,696	$ 8,116	$ 10,951
Other comprehensive income:
Foreign currency translation adjustments, net of tax	146	(89)	(602)	(141)
Comprehensive income	$ 2,295	$ 4,607	$ 7,514	$ 10,810