Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues:
Revenues	$ 21,158	$ 20,541
Costs and Expenses:
Costs of revenues	8,487	7,867
Research and development	8,590	8,246
Selling, general and administrative	7,895	7,011
Amortization of other acquired intangible assets	173	108
Restructuring charges		92
Interest and other expense (income), net	20	6
Loss before income taxes	(4,007)	(2,789)
Income tax benefit	(3,479)	(98)
Net loss	(528)	(2,691)
Other comprehensive loss:
Foreign currency translation adjustments, net of tax	(166)	(52)
Comprehensive loss	$ (694)	$ (2,743)
Net loss per share:
Basic (in dollars per share)	$ (0.02)	$ (0.08)
Diluted (in dollars per share)	$ (0.02)	$ (0.08)
Weighted average common shares:
Basic (in shares)	32,703	32,485
Diluted (in shares)	32,703	32,485
Analytics [Member]
Revenues:
Revenues	$ 13,248	$ 11,434
Integrated Yield Ramp [Member]
Revenues:
Revenues	$ 7,910	$ 9,107