Leases - Components of Lease Cost (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease costs	$ 453	$ 642
Short-term lease costs	167	114
Variable lease costs	6	2
Amortization of finance lease assets	72	77
Interest on finance lease liabilities	7	8
Total lease cost	$ 705	$ 843