Prepaid Expenses and Other Assets - Summary of Prepaid Expenses and Other Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Prepaid Expense and Other Assets [Abstract]
Prepaid expenses	$ 8,282	$ 3,390
Revenues in excess of billings	6,664	7,987
Contract retainage	1,832	2,469
Income tax receivable	2,675	471
Other	350	1,245
Total prepaid expenses and other assets	$ 19,803	$ 15,562