CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues:
Revenues	$ 33,498	$ 24,200
Costs and Expenses:
Costs of revenues	11,529	10,663
Research and development	14,089	10,841
Selling, general and administrative	10,839	9,464
Amortization of acquired intangible assets	314	314
Interest and other expense (income), net	(310)	(441)
Loss before income taxes	(2,963)	(6,641)
Income tax expense	1,187	956
Net loss	(4,150)	(7,597)
Other comprehensive loss:
Foreign currency translation adjustments, net of tax	(397)	(530)
Change in unrealized losses related to available-for-sale debt securities, net of tax	(34)	2
Total other comprehensive income loss	(431)	(528)
Comprehensive loss	$ (4,581)	$ (8,125)
Net loss per share, basic (in dollars per share)	$ (0.11)	$ (0.21)
Net loss per share, diluted (in dollars per share)	$ (0.11)	$ (0.21)
Weighted average common shares used to calculate net loss per share, basic (in shares)	37,606	36,974
Weighted average common shares used to calculate net loss per share, diluted (in shares)	37,606	36,974
Analytics [Member]
Revenues:
Revenues	$ 30,426	$ 19,393
Integrated Yield Ramp [Member]
Revenues:
Revenues	$ 3,072	$ 4,807