Summary of Company's Net Revenues (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Net revenue	$ 83,755	$ 78,142
Physical access and identity control readers
Segment Reporting Information [Line Items]
Net revenue	25,155	21,680
Controller panels
Segment Reporting Information [Line Items]
Net revenue	16,460	14,509
Access cards and provisioning
Segment Reporting Information [Line Items]
Net revenue	10,963	14,237
Tags and transponders
Segment Reporting Information [Line Items]
Net revenue	15,376	12,953
Video technology and analytics
Segment Reporting Information [Line Items]
Net revenue	6,128	6,293
Services
Segment Reporting Information [Line Items]
Net revenue	7,402	6,152
Third party access control products
Segment Reporting Information [Line Items]
Net revenue	652	1,205
Software
Segment Reporting Information [Line Items]
Net revenue	$ 1,619	$ 1,113