Annual report pursuant to Section 13 and 15(d)

Components of Selected Balance Sheet Accounts (Detail)

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Components of Selected Balance Sheet Accounts (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Other current assets:    
Tubular inventory and well materials $ 4,061 $ 5,146
Prepaid expenses 1,064 1,104
Other current assets 5,125 6,250
Other assets:    
Deferred issuance costs of the Credit Facility 2,437 2,857
Escrow Deposit Remaining 0 3,210 [1]
Other 44 2,440
Accounts payable and accrued liabilities:    
Trade accounts payable 16,507 22,579
Drilling costs 22,434 22,389
Royalties and revenue - related 51,212 39,287
Production, ad valorem and other taxes [2] 2,418 1,275
Compensation-related 4,489 2,975
Interest 670 223
Bankruptcy Claims, amount reserved for outstanding claims 0 3,933
Other 2 [2] 5,970 3,520
Other liabilities:    
Asset retirement obligations 4,314 3,286
Defined benefit pension obligations 857 971
Postretirement health care benefit obligations 362 476
Other $ 0 $ 100
[1] 1 The December 31, 2017 amount represents amounts that had remained in the Escrow Account for the Devon Acquisition which fully funded the remaining liability due to Devon for the final settlement (see Note 5).
[2] 2 The amount for December 31, 2017 was reclassified from Accounts payable and accrued liabilities - Other.