Revenue - Summary of Opening and Closing Balances of Company's Customer Receivables and Current and Long-term Contract Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Customer receivables	$ 75,518	$ 40,785
Contract liabilities—current	7,983	8,249
Contract liabilities—noncurrent	12,165	$ 13,106
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Customer receivables	34,733
Contract liabilities—current	(266)
Contract liabilities—noncurrent	$ (941)