Information Regarding Net Revenue and Gross Profit by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Net revenue	$ 13,392	$ 12,485
Gross profit	$ 5,697	$ 5,294
Gross profit margin	43.00%	42.00%
Operating expenses:
Research and development	$ 1,477	$ 2,085
Selling and marketing	3,379	4,216
General and administrative	1,787	4,577
Restructuring and severance		2,739
Total operating expenses	6,643	13,617
Loss from operations	(946)	(8,323)
Non-operating income (expense):
Interest expense, net	(674)	(770)
Gain on extinguishment of debt	977
Foreign currency (losses) gains, net	(152)	229
Loss before income taxes and noncontrolling interest	(795)	(8,864)
PACS
Segment Reporting Information [Line Items]
Net revenue	5,364	5,113
Gross profit	$ 3,099	$ 2,875
Gross profit margin	58.00%	56.00%
Identity
Segment Reporting Information [Line Items]
Net revenue	$ 3,089	$ 2,506
Gross profit	$ 1,124	$ 951
Gross profit margin	36.00%	38.00%
Credentials
Segment Reporting Information [Line Items]
Net revenue	$ 4,935	$ 4,436
Gross profit	$ 1,470	$ 1,214
Gross profit margin	30.00%	27.00%
All Other
Segment Reporting Information [Line Items]
Net revenue	$ 4	$ 430
Gross profit	$ 4	$ 254
Gross profit margin	107.00%	59.00%