Nature of Business and Summary of Significant Accounting Policies - Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash Reported within Consolidated Statements of Cash Flows (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounting Changes And Error Corrections [Abstract]
Cash and cash equivalents	$ 35,992	$ 35,602
Restricted cash	1,819	1,356
Total cash, cash equivalents and restricted cash	$ 37,811	$ 36,958	$ 44,438	$ 30,659