Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue:
Total revenue	$ 16,694	$ 19,653	$ 56,575	$ 61,342
Cost of revenue:
Total cost of revenue	13,335	15,273	44,755	46,836
Gross profit	3,359	4,380	11,820	14,506
Operating expenses:
Selling, general and administrative	3,199	5,338	13,548	15,249
Research and development	2,292	1,588	6,600	4,381
Total operating expenses	5,491	6,926	20,148	19,630
Loss from operations	(2,132)	(2,546)	(8,328)	(5,124)
Other income, net	65	34	156	148
Loss before income taxes	(2,067)	(2,512)	(8,172)	(4,976)
Income tax benefit (expense)	(20)	44	(32)	150
Net loss	$ (2,087)	$ (2,468)	$ (8,204)	$ (4,826)
Basic loss per share	$ (0.16)	$ (0.20)	$ (0.65)	$ (0.38)
Diluted loss per share	$ (0.16)	$ (0.20)	$ (0.65)	$ (0.38)
Shares used in per share calculations:
Basic	12,721	12,607	12,697	12,578
Diluted	12,721	12,607	12,697	12,578
Net loss	$ (2,087)	$ (2,468)	$ (8,204)	$ (4,826)
Other comprehensive income
Foreign currency translation, net of tax	15	14	25	36
Unrealized gain (loss) on investments, net of tax	4	(3)	6
Total other comprehensive income	19	11	31	36
Comprehensive loss	(2,068)	(2,457)	(8,173)	(4,790)
Third Party Software [Member]
Revenue:
Total revenue	14,241	16,240	47,297	48,542
Cost of revenue:
Total cost of revenue	12,003	13,619	39,837	40,804
Gross profit	2,238	2,621	7,460	7,738
Proprietary Software [Member]
Revenue:
Total revenue	796	1,200	2,872	4,335
Cost of revenue:
Total cost of revenue	111	34	252	105
Gross profit	685	1,166	2,620	4,230
Professional Engineering Service [Member]
Revenue:
Total revenue	1,657	2,213	6,406	8,465
Cost of revenue:
Total cost of revenue	1,221	1,620	4,666	5,927
Gross profit	$ 436	$ 593	$ 1,740	$ 2,538