Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenue:
Software	$ 17,440	$ 19,216	$ 52,877	$ 58,118
Professional engineering service	2,213	3,251	8,465	12,526
Total revenue	19,653	22,467	61,342	70,644
Cost of revenue:
Software	13,653	15,281	40,909	47,901
Professional engineering service	1,620	3,509	5,927	10,877
Total cost of revenue	15,273	18,790	46,836	58,778
Gross profit	4,380	3,677	14,506	11,866
Operating expenses:
Selling, general and administrative	5,338	3,283	15,249	9,693
Research and development	1,588	809	4,381	2,024
Total operating expenses	6,926	4,092	19,630	11,717
Income (loss) from operations	(2,546)	(415)	(5,124)	149
Other income, net	34	128	148	204
Income (loss) before income taxes	(2,512)	(287)	(4,976)	353
Income tax benefit (expense)	44	181	150	(144)
Net income (loss)	$ (2,468)	$ (106)	$ (4,826)	$ 209
Basic income (loss) per share	$ (0.20)	$ (0.01)	$ (0.38)	$ 0.02
Diluted income (loss) per share	$ (0.20)	$ (0.01)	$ (0.38)	$ 0.02
Shares used in calculation of income (loss) per share:
Basic	12,607	12,310	12,578	12,189
Diluted	12,607	12,310	12,578	12,576
Comprehensive income (loss):
Net income (loss)	$ (2,468)	$ (106)	$ (4,826)	$ 209
Other comprehensive income (loss):
Foreign currency translation, net of tax	14	(78)	36	(44)
Change in unrealized gains (losses) on investments, net of tax	(3)	29		6
Total other comprehensive income (loss)	11	(49)	36	(38)
Comprehensive income (loss)	$ (2,457)	$ (155)	$ (4,790)	$ 171