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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 |

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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918643-209977 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(1) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 + Details
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