Leases - Schedule of Classification of ROU Assets and Lease liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Aug. 31, 2019
ASSETS
Operating right-of-use assets	$ 2,289	$ 2,272	$ 2,100
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other noncurrent assets	Other noncurrent assets
Finance right-of-use assets	$ 148	$ 157
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other noncurrent assets	Other noncurrent assets
Total lease assets	$ 2,437	$ 2,429
Current
Operating leases	$ 475	$ 269
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued liabilities	Accrued liabilities
Finance leases	$ 62	$ 68
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued liabilities	Accrued liabilities
Noncurrent
Operating leases	$ 3,600	$ 3,949
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-term liabilities	Long-term liabilities
Finance leases	$ 92	$ 96
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-term liabilities	Long-term liabilities
Total lease liabilities	$ 4,229	$ 4,382