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Summary of Significant Accounting Policies - Leases - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2020
Dec. 31, 2019
Operations And Summary Of Significant Accounting Policies [Line Items]      
Operating lease, right-of-use assets $ 3,992 $ 3,992 $ 3,509
Operating lease liabilities, short term 2,331 2,331 1,994
Operating lease liabilities, long term 1,661 $ 1,661 $ 1,515
Prior advance notice period for cancellation of rig contracts   45 days  
Cash payments for operating leases associated with right-of-use assets $ 600 $ 1,200  
Operating lease, weighted average remaining lease term 1 year 9 months 18 days 1 year 9 months 18 days  
Operating lease, weighted average discount rate, percent 4.50% 4.50%  
Expected future payments for contracted drilling services $ 3,500 $ 3,500  
ASU 842      
Operations And Summary Of Significant Accounting Policies [Line Items]      
Operating lease, right-of-use assets 4,000 4,000  
Operating lease liabilities, short term 2,300 2,300  
Operating lease liabilities, long term $ 1,700 $ 1,700