Information about Geographic Areas and Operating Segments - Profit and Loss Information of Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Revenue	$ 18,848	$ 22,738	$ 41,689	$ 48,177
Cost of revenue	14,975	18,845	31,563	39,988
Gross profit	3,873	3,893	10,126	8,189
Operating expenses	6,492	3,978	12,704	7,625
Other income, net	59	55	114	76
Income tax benefit (expense)		(155)	106	(325)
Net income (loss)	(2,560)	(185)	(2,358)	315
Software [Member]
Segment Reporting Information [Line Items]
Revenue	15,986	18,735	35,437	38,902
Cost of revenue	13,142	15,459	27,256	32,620
Gross profit	2,844	3,276	8,181	6,282
Professional Engineering Services [Member]
Segment Reporting Information [Line Items]
Revenue	2,862	4,003	6,252	9,275
Cost of revenue	1,833	3,386	4,307	7,368
Gross profit	$ 1,029	$ 617	$ 1,945	$ 1,907