Summary of Company's Net Revenues (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Net revenue	$ 60,794	$ 81,249
Tags and transponders
Segment Reporting Information [Line Items]
Net revenue	20,310	34,659
Logical and physical access control readers
Segment Reporting Information [Line Items]
Net revenue	17,165	21,084
Controller panels
Segment Reporting Information [Line Items]
Net revenue	10,272	9,215
Access cards and provisioning
Segment Reporting Information [Line Items]
Net revenue	7,394	7,413
Third party access control products
Segment Reporting Information [Line Items]
Net revenue	1,523	2,097
Other
Segment Reporting Information [Line Items]
Net revenue	$ 4,130	$ 6,781