Information Regarding Net Revenue and Gross Profit by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Net revenue	$ 15,560	$ 17,196		$ 41,521	$ 47,717
Gross profit	$ 6,920	$ 7,521		$ 17,483	$ 20,251
Gross profit margin	44.00%	44.00%		42.00%	42.00%
Operating expenses:
Research and development	$ 1,480	$ 2,235		$ 4,997	$ 6,567
Selling and marketing	3,312	5,236		10,807	15,698
General and administrative	2,115	6,456		9,674	15,057
Impairment of goodwill			$ 1,000		988
Restructuring and severance	160	215		3,100	408
Total operating expenses	7,067	14,142		28,578	38,718
Loss from operations	(147)	(6,621)		(11,095)	(18,467)
Non-operating income (expense):
Interest expense, net	(525)	(478)		(1,814)	(1,367)
Foreign currency gain (loss), net	35	(10)		309	(186)
Loss before income taxes and noncontrolling interest	(637)	(7,109)		(12,600)	(20,020)
PACS
Segment Reporting Information [Line Items]
Net revenue	7,253	5,976		17,908	15,212
Gross profit	$ 4,334	$ 3,531		$ 10,244	$ 9,130
Gross profit margin	60.00%	59.00%		57.00%	60.00%
Identity
Segment Reporting Information [Line Items]
Net revenue	$ 3,508	$ 3,109		$ 8,923	$ 8,970
Gross profit	$ 1,359	$ 1,526		$ 3,324	$ 3,988
Gross profit margin	39.00%	49.00%		37.00%	44.00%
Credentials
Segment Reporting Information [Line Items]
Net revenue	$ 4,799	$ 7,788		$ 14,110	$ 22,324
Gross profit	$ 1,227	$ 2,255		$ 3,654	$ 6,357
Gross profit margin	26.00%	29.00%		26.00%	28.00%
All Other
Segment Reporting Information [Line Items]
Net revenue		$ 323		$ 580	$ 1,211
Gross profit		$ 209		$ 261	$ 776
Gross profit margin	0.00%	65.00%		45.00%	64.00%