Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Payables And Accruals [Abstract]
Accrued product costs	$ 369	$ 400
Accrued coop advertising	46	44
Accrued vacation pay	197	179
Income taxes payable	3
Other accruals	878	974
Total	$ 1,493	$ 1,597