Other Accrued Expenses and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accrued Liabilities And Other Liabilities Current [Abstract]
Rental payments due to landlord	$ 922
Accrued professional fees	576	$ 586
Accrued restructuring	294	801
Customer deposits	149	72
Accrued warranties	377	321
Other accrued expenses	1,456	1,460
Total	$ 3,774	$ 3,240