Summary Information by Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012		Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Net revenue	$ 26,268	$ 22,945	[1]	$ 70,927	$ 68,007	[1]
Total net revenues	26,268	22,945	[1]	70,927	68,007	[1]
Gross profit	11,323	9,720	[1]	28,671	28,058	[1]
Gross profit %	43.00%	42.00%		40.00%	41.00%
Identity Management
Segment Reporting Information [Line Items]
Net revenue	12,331	13,833		33,977	40,721
Total net revenues	12,331	13,833		33,977	40,721
Elimination of intersegment revenues	(17)	(1)		(22)	(20)
Gross profit	5,666	6,872		15,422	19,053
Gross profit %	46.00%	50.00%		45.00%	47.00%
Identity Management | External Customer
Segment Reporting Information [Line Items]
Net revenue	12,331	13,833		33,977	40,721
Total net revenues	12,331	13,833		33,977	40,721
Identity Management | Intersegment
Segment Reporting Information [Line Items]
Net revenue	17	1		22	20
Total net revenues	17	1		22	20
Identity Management | Corporate Segment
Segment Reporting Information [Line Items]
Net revenue	12,348	13,834		33,999	40,741
Total net revenues	12,348	13,834		33,999	40,741
ID Products
Segment Reporting Information [Line Items]
Net revenue	13,937	9,112		36,950	27,286
Total net revenues	13,937	9,112		36,950	27,286
Elimination of intersegment revenues	(171)	(106)		(463)	(414)
Gross profit	5,657	2,848		13,249	9,005
Gross profit %	41.00%	31.00%		36.00%	33.00%
ID Products | External Customer
Segment Reporting Information [Line Items]
Net revenue	13,937	9,112		36,950	27,286
Total net revenues	13,937	9,112		36,950	27,286
ID Products | Intersegment
Segment Reporting Information [Line Items]
Net revenue	171	106		463	414
Total net revenues	171	106		463	414
ID Products | Corporate Segment
Segment Reporting Information [Line Items]
Net revenue	14,108	9,218		37,413	27,700
Total net revenues	$ 14,108	$ 9,218		$ 37,413	$ 27,700

[1] Certain amounts shown in the table above have changed as compared to amounts reported in prior periods as noted in Item 1, Financial Statements, Note 1 of Notes to Condensed Consolidated Financial Statements, Reclassifications and Restatements.