Information about Geographic Areas and Operating Segments - Profit and Loss Information of Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Revenue	$ 16,694	$ 19,653	$ 56,575	$ 61,342
Cost of revenue	13,335	15,273	44,755	46,836
Gross profit	3,359	4,380	11,820	14,506
Operating expenses	5,491	6,926	20,148	19,630
Other income, net	65	34	156	148
Income tax benefit (expense)	(20)	44	(32)	150
Net loss	(2,087)	(2,468)	(8,204)	(4,826)
Third Party Software [Member]
Segment Reporting Information [Line Items]
Revenue	14,241	16,240	47,297	48,542
Cost of revenue	12,003	13,619	39,837	40,804
Gross profit	2,238	2,621	7,460	7,738
Proprietary Software [Member]
Segment Reporting Information [Line Items]
Revenue	796	1,200	2,872	4,335
Cost of revenue	111	34	252	105
Gross profit	685	1,166	2,620	4,230
Professional Engineering Service [Member]
Segment Reporting Information [Line Items]
Revenue	1,657	2,213	6,406	8,465
Cost of revenue	1,221	1,620	4,666	5,927
Gross profit	$ 436	$ 593	$ 1,740	$ 2,538