Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue:
Professional engineering service	$ 2,819	$ 3,390
Total revenue	20,678	22,841
Cost of revenue:
Professional engineering service	2,083	2,474
Total cost of revenue	15,478	16,588
Gross profit	5,200	6,253
Operating expenses:
Selling, general and administrative	5,448	4,865
Research and development	2,230	1,347
Total operating expenses	7,678	6,212
Income (loss) from operations	(2,478)	41
Other income, net	44	55
Income (loss) before income taxes	(2,434)	96
Income tax benefit		106
Net income (loss)	$ (2,434)	$ 202
Basic income (loss) per share	$ (0.19)	$ 0.02
Diluted income (loss) per share	$ (0.19)	$ 0.02
Shares used in per share calculations:
Basic	12,673	12,550
Diluted	12,673	12,848
Net income (loss)	$ (2,434)	$ 202
Other comprehensive loss
Foreign currency translation, net of tax	(11)	(7)
Unrealized gain on investments, net of tax	10	5
Total other comprehensive loss	(1)	(2)
Comprehensive income (loss)	(2,435)	200
Third Party Software [Member]
Revenue:
Software	16,064	16,797
Cost of revenue:
Software	13,354	14,082
Proprietary Software [Member]
Revenue:
Software	1,795	2,654
Cost of revenue:
Software	$ 41	$ 32