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Additional Balance Sheet Information
3 Months Ended
Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Additional Balance Sheet Information
(3) Additional Balance Sheet Information:
Certain balance sheet amounts are comprised of the following:
 
(Thousands of dollars)
 
March 31,
2019
 
 
December 31,
2018
 
Accounts Receivable:
 
 
 
 
 
 
 
 
Joint interest billing
 
$
2,899
 
 
$
1,976
 
Trade receivables
 
 
2,258
 
 
 
1,979
 
Oil and gas sales
 
 
11,377
 
 
 
6,112
 
Tax refund receivable
 
 
4,760
 
 
 
4,760
 
Other
 
 
798
 
 
 
358
 
 
 
 
22,092
 
 
 
15,185
 
Less: Allowance for doubtful accounts
 
 
(224
)
 
 
(224
)
Total
 
$
21,868
 
 
$
14,961
 
Accounts Payable:
 
 
 
 
 
 
 
 
Trade
 
$
8,682
 
 
$
1,174
 
Royalty and other owners
 
 
5,165
 
 
 
6,197
 
Partner advances
 
 
1,197
 
 
 
1,143
 
Prepaid drilling deposits
 
 
160
 
 
 
214
 
Other
 
 
759
 
 
 
825
 
Total
 
$
15,963
 
 
$
9,553
 
Accrued Liabilities:
 
 
 
 
 
 
 
 
Compensation and related expenses
 
$
3,345
 
 
$
2,907
 
Property costs
 
 
5,085
 
 
 
14,993
 
Other
 
 
149
 
 
 
531
 
Total
 
$
8,579
 
 
$
18,431