Basis of Presentation and Significant Accounting Policies - Summary of Deferred Revenue (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Deferred Revenue Arrangement [Line Items]
Contract liabilities	$ 6,377	$ 6,384
Short-term Contract with Customer [Member]
Deferred Revenue Arrangement [Line Items]
Contract liabilities	5,957	6,117
Long-term Contract with Customer [Member]
Deferred Revenue Arrangement [Line Items]
Contract liabilities	$ 420	$ 267