Accrued and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Payables and Accruals [Abstract]
Accrued payroll and employee benefits	$ 2,302	$ 1,837
Accrued insurance	2,546	2,569
Accrued legal	81	295
Accrued taxes	1,371	695
Accrued interest	210	179
Accrued operating costs	2,503	2,653
Accrued other	278	394
Current operating lease liabilities	348	1,442
Total accrued and other current liabilities	$ 9,639	$ 10,064