Property and Equipment, Net - Summary of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Total, at cost	$ 24,751	$ 21,345
Less: accumulated depreciation and amortization	(10,519)	(8,578)
Property and equipment, net	14,232	12,767
Land [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	2,134	2,134
Building [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	4,005	3,997
Computer Hardware and Software [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	13,295	11,072
Office Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	2,561	2,255
Tenant and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	620	620
Other [Member]
Property, Plant and Equipment [Line Items]
Total, at cost	$ 2,136	$ 1,267