Information Regarding Net Revenue and Gross Profit by Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Net revenue	$ 17,160	$ 15,955
Gross profit	6,640	6,753
Gross profit %	39.00%	42.00%
Operating Segments | Premises
Segment Reporting Information [Line Items]
Net revenue	3,467	4,984
Gross profit	2,144	3,151
Gross profit %	62.00%	63.00%
Operating Segments | Identity
Segment Reporting Information [Line Items]
Net revenue	5,020	4,554
Gross profit	2,237	1,647
Gross profit %	45.00%	36.00%
Operating Segments | Credentials
Segment Reporting Information [Line Items]
Net revenue	7,467	5,479
Gross profit	1,644	1,665
Gross profit %	22.00%	30.00%
Operating Segments | Other Business Segment
Segment Reporting Information [Line Items]
Net revenue	1,206	938
Gross profit	$ 615	$ 290
Gross profit %	51.00%	31.00%