Information Regarding Net Revenue and Gross Profit by Segment (Detail) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Net revenue	$ 15,587,000	$ 22,301,000	$ 30,521,000	$ 39,155,000
Gross profit	$ 6,646,000	$ 8,930,000	$ 12,730,000	$ 15,532,000
Gross profit margin	43.00%	40.00%	42.00%	40.00%
Operating expenses:
Research and development	$ 2,340,000	$ 1,731,000	$ 4,332,000	$ 3,233,000
Selling and marketing	5,467,000	5,731,000	10,462,000	10,766,000
General and administrative	5,536,000	2,867,000	8,601,000	5,910,000
Impairment of goodwill	988,000		988,000		$ 0
Restructuring and severance	21,000	612,000	193,000	1,049,000
Total operating expenses	14,352,000	10,941,000	24,576,000	20,958,000
Loss from operations	(7,706,000)	(2,011,000)	(11,846,000)	(5,426,000)
Non-operating income (expense):
Interest expense, net	(465,000)	(506,000)	(889,000)	(2,590,000)
Foreign currency gain (loss), net	51,000	(159,000)	(176,000)	(252,000)
Loss from continuing operations before income taxes and noncontrolling interest	(8,120,000)	(2,676,000)	(12,911,000)	(8,268,000)
Premises
Segment Reporting Information [Line Items]
Net revenue	4,564,000	4,620,000	9,236,000	8,087,000
Gross profit	$ 2,900,000	$ 2,839,000	$ 5,599,000	$ 4,983,000
Gross profit margin	64.00%	61.00%	61.00%	62.00%
Identity
Segment Reporting Information [Line Items]
Net revenue	$ 3,267,000	$ 3,768,000	$ 5,861,000	$ 8,788,000
Gross profit	$ 1,459,000	$ 1,847,000	$ 2,462,000	$ 4,084,000
Gross profit margin	45.00%	49.00%	42.00%	46.00%
Operating expenses:
Impairment of goodwill	$ 1,000,000
Credentials
Segment Reporting Information [Line Items]
Net revenue	7,379,000	$ 13,171,000	$ 14,536,000	$ 20,332,000
Gross profit	$ 2,060,000	$ 3,796,000	$ 4,102,000	$ 5,402,000
Gross profit margin	28.00%	29.00%	28.00%	27.00%
All Other
Segment Reporting Information [Line Items]
Net revenue	$ 377,000	$ 742,000	$ 888,000	$ 1,948,000
Gross profit	$ 227,000	$ 448,000	$ 567,000	$ 1,063,000
Gross profit margin	60.00%	60.00%	64.00%	55.00%