Accrued and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Payables and Accruals [Abstract]
Accrued payroll and employee benefits	$ 1,264	$ 1,837
Accrued insurance	2,601	2,569
Accrued legal	144	295
Accrued taxes	1,067	695
Accrued interest	235	179
Accrued operating costs	2,452	2,653
Accrued other	424	394
Current operating lease liabilities	518	1,442
Total accrued and other current liabilities	$ 8,705	$ 10,064