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Supplemental Balance Sheet Detail (Tables)
 9 Months Ended
Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Components of Selected Balance Sheet Accounts
The following table summarizes components of selected balance sheet accounts as of the dates presented:
 September 30,December 31,
 20202019
Other current assets:  
Tubular inventory and well materials 1
$6,430 $2,989 
Prepaid expenses 1
6,406 1,469 
 $12,836 $4,458 
Other assets:  
Deferred issuance costs of the Credit Facility, net of amortization$2,524 $3,952 
Right-of-use assets – operating leases2,625 2,740 
Other110 32 
 $5,259 $6,724 
Accounts payable and accrued liabilities:  
Trade accounts payable $3,522 $30,098 
Drilling costs4,651 18,832 
Royalties27,936 44,537 
Production, ad valorem and other taxes5,352 3,244 
Compensation3,877 5,272 
Interest 647 730 
Current operating lease obligations953 847 
Other1,407 2,264 
 $48,345 $105,824 
Other liabilities:  
Asset retirement obligations$5,321 $4,934 
Noncurrent operating lease obligations1,948 2,232 
Defined benefit pension obligations 785 873 
Postretirement health care benefit obligations 389 343 
 $8,443 $8,382