Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues:
Design-to-silicon-yield solutions	$ 20,574	$ 14,159	$ 39,152	$ 32,311
Gainshare performance incentives	6,114	9,051	12,617	17,716
Total revenues	26,688	23,210	51,769	50,027
Costs of Design-to-silicon-yield solutions:
Direct costs of Design-to-silicon-yield solutions	10,558	9,888	20,668	18,692
Amortization of acquired technology	96		192
Total cost of Design-to-silicon-yield solutions	10,654	9,888	20,860	18,692
Gross profit	16,034	13,322	30,909	31,335
Operating expenses:
Research and development	7,060	4,437	13,371	8,525
Selling, general and administrative	5,094	5,216	10,218	9,672
Amortization of other acquired intangible assets	117		234
Total operating expenses	12,271	9,653	23,823	18,197
Income from operations	3,763	3,669	7,086	13,138
Interest and other income (expense), net	(51)	52	(287)	103
Income before income taxes	3,712	3,721	6,799	13,241
Income tax provision	1,498	1,572	2,523	5,125
Net income	$ 2,214	$ 2,149	$ 4,276	$ 8,116
Net income per share:
Basic (in dollars per share)	$ 0.07	$ 0.07	$ 0.14	$ 0.26
Diluted (in dollars per share)	$ 0.07	$ 0.07	$ 0.13	$ 0.25
Weighted average common shares:
Basic (in shares)	31,276	31,522	31,222	31,429
Diluted (in shares)	32,023	32,400	31,872	32,345
Net income	$ 2,214	$ 2,149	$ 4,276	$ 8,116
Other comprehensive income:
Foreign currency translation adjustments, net of tax	(186)	146	173	(602)
Comprehensive income	$ 2,028	$ 2,295	$ 4,449	$ 7,514