Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenue:
Software	$ 15,986	$ 18,735	$ 35,437	$ 38,902
Professional engineering service	2,862	4,003	6,252	9,275
Total revenue	18,848	22,738	41,689	48,177
Cost of revenue:
Software	13,142	15,459	27,256	32,620
Professional engineering service	1,833	3,386	4,307	7,368
Total cost of revenue	14,975	18,845	31,563	39,988
Gross profit	3,873	3,893	10,126	8,189
Operating expenses:
Selling, general and administrative	5,046	3,204	9,911	6,410
Research and development	1,446	774	2,793	1,215
Total operating expenses	6,492	3,978	12,704	7,625
Income (loss) from operations	(2,619)	(85)	(2,578)	564
Other income, net	59	55	114	76
Income (loss) before income taxes	(2,560)	(30)	(2,464)	640
Income tax benefit (expense)		(155)	106	(325)
Net income (loss)	$ (2,560)	$ (185)	$ (2,358)	$ 315
Basic income (loss) per share	$ (0.20)	$ (0.02)	$ (0.19)	$ 0.03
Diluted income (loss) per share	$ (0.20)	$ (0.02)	$ (0.19)	$ 0.03
Shares used in calculation of income (loss) per share:
Basic	12,577	12,152	12,563	12,127
Diluted	12,577	12,152	12,563	12,559
Comprehensive income (loss):
Net income (loss)	$ (2,560)	$ (185)	$ (2,358)	$ 315
Other comprehensive income (loss):
Foreign currency translation, net of tax	14	13	22	34
Change in unrealized gains (losses) on investments, net of tax	(2)	2	3	(23)
Total other comprehensive income (loss)	12	15	25	11
Comprehensive income (loss)	$ (2,548)	$ (170)	$ (2,333)	$ 326