CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues:
Revenues	$ 148,549	$ 111,060	$ 88,046
Costs and Expenses:
Costs of revenues	47,907	44,193	36,765
Research and development	56,126	43,780	34,654
Selling, general and administrative	45,338	37,649	32,677
Amortization of acquired intangible assets	1,270	1,255	741
Interest and other expense (income), net	(2,562)	(683)	1,269
Income (loss) before income taxes	470	(18,317)	(18,060)
Income tax expense	3,899	3,171	22,303
Net income (loss)	(3,429)	(21,488)	(40,363)
Other comprehensive loss:
Foreign currency translation adjustments, net of tax	(1,493)	(825)	1,253
Change in unrealized gain (loss) related to available-for-sale debt securities, net of tax	7	(14)	2
Total other comprehensive loss	(1,486)	(839)	1,255
Comprehensive income (loss)	$ (4,915)	$ (22,327)	$ (39,108)
Net income (loss) per share, basic (in dollars per share)	$ (0.09)	$ (0.58)	$ (1.17)
Net income (loss) per share, diluted (in dollars per share)	$ (0.09)	$ (0.58)	$ (1.17)
Weighted average common shares used to calculate net income (loss) per share, basic (in shares)	37,309	37,138	34,458
Weighted average common shares used to calculate net income (loss) per share, diluted (in shares)	37,309	37,138	34,458
Analytics
Revenues:
Revenues	$ 130,480	$ 93,415	$ 57,232
Integrated Yield Ramp
Revenues:
Revenues	$ 18,069	$ 17,645	$ 30,814