Payment Obligation in Connection with Hirsch Acquisition (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
2020	$ 8,419
Total	8,419
Less: Current portion - payment obligation	(1,311)	$ (1,025)
Long-term payment obligation	360	$ 1,860
Hirsch Electronics
Related Party Transaction [Line Items]
2020	1,402
2021	361
Present value discount factor	(92)
Total	1,671
Less: Current portion - payment obligation	(1,311)
Long-term payment obligation	$ 360