Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue:
Total revenue	$ 15,096	$ 20,678
Cost of revenue:
Total cost of revenue	12,705	15,478
Gross profit	2,391	5,200
Operating expenses:
Selling, general and administrative	2,934	5,448
Research and development	2,336	2,230
Total operating expenses	5,270	7,678
Loss from operations	(2,879)	(2,478)
Other income, net	33	44
Loss before income taxes	(2,846)	(2,434)
Net loss	$ (2,846)	$ (2,434)
Basic loss per share	$ (0.22)	$ (0.19)
Diluted loss per share	$ (0.22)	$ (0.19)
Shares used in per share calculations:
Basic	12,795	12,673
Diluted	12,795	12,673
Comprehensive loss:
Net loss	$ (2,846)	$ (2,434)
Other comprehensive income (loss):
Foreign currency translation, net of tax	2	(11)
Unrealized gain on investments, net of tax	8	10
Total other comprehensive income (loss)	10	(1)
Comprehensive loss	(2,836)	(2,435)
Third Party Software [Member]
Revenue:
Total revenue	13,101	16,064
Cost of revenue:
Total cost of revenue	11,149	13,354
Gross profit	1,952	2,710
Proprietary Software [Member]
Revenue:
Total revenue	251	1,795
Cost of revenue:
Total cost of revenue	213	41
Gross profit	38	1,754
Professional Engineering Service [Member]
Revenue:
Total revenue	1,744	2,819
Cost of revenue:
Total cost of revenue	1,343	2,083
Gross profit	$ 401	$ 736