Annual report pursuant to Section 13 and 15(d)

Note 1 - Significant Accounting Policies (Tables)

v3.19.3.a.u2
Note 1 - Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
   
Year Ended December 31,
 
   
2019
   
2018
   
2017
 
Customer
     
 
     
 
     
 
Shell Trading (US) Co./ Shell Energy N.A.
   
11
%    
30
%    
46
%
BP Products North America
   
40
%    
20
%    
**
 
Vitol Inc.
   
12
%    
14
%    
15
%
Accounts Receivable, Allowance for Credit Loss [Table Text Block]
   
2019
   
2018
   
2017
 
Allowance for doubtful accounts, beginning of period
  $
9,692
    $
9,114
    $
7,602
 
Additional provisions for the year
   
206
     
1,233
     
1,512
 
Uncollectible accounts written off
   
     
(655
)    
 
Allowance for doubtful accounts, end of period
  $
9,898
    $
9,692
    $
9,114
 
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
   
December 31,
 
   
2019
   
2018
 
Derivatives – current (1)
  $
7,266
    $
60,687
 
Unamortized bonds/insurance premiums
   
4,357
     
5,197
 
Prepaid deposits related to royalties
   
7,980
     
8,872
 
Prepayment to vendors    
10,202
     
864
 
Other
   
886
     
786
 
Prepaid expenses and other assets
  $
30,691
    $
76,406
 
Property, Plant and Equipment [Table Text Block]
   
December 31,
 
   
2019
   
2018
 
Oil and natural gas properties and equipment
  $
8,532,196
    $
8,169,871
 
Furniture, fixtures and other
   
20,317
     
20,228
 
Total property and equipment
   
8,552,513
     
8,190,099
 
Less accumulated depreciation, depletion and amortization
   
7,803,715
     
7,674,678
 
Oil and natural gas properties and other, net
  $
748,798
    $
515,421
 
Schedule of Other Assets, Noncurrent [Table Text Block]
   
December 31,
 
   
2019
   
2018
 
Appeal bond deposits
  $
6,925
    $
6,925
 
Escrow deposit – Apache lawsuit (Note 18)
   
     
49,500
 
Unamortized debt issuance costs
   
3,798
     
4,773
 
Investment in White Cap, LLC
   
2,590
     
2,586
 
Derivatives
   
2,653
     
21,275
 
Unamortized brokerage fee for Monza
   
3,423
     
2,277
 
Proportional consolidation of Monza's other assets (Note 4)
   
5,308
     
3,275
 
ROU assets (Note 7)
   
7,936
     
 
Other
   
814
     
936
 
Total other assets
  $
33,447
    $
91,547
 
Schedule of Accrued Liabilities [Table Text Block]
   
December 31,
 
   
2019
   
2018
 
Accrued interest
  $
10,180
    $
12,385
 
Accrued salaries/payroll taxes/benefits
   
2,377
     
2,320
 
Incentive compensation plans
   
9,794
     
10,817
 
Litigation accruals
   
3,673
     
3,673
 
Lease liability (Note 7)
   
2,716
     
 
Derivatives    
1,785
     
 
Other
   
371
     
416
 
Total accrued liabilities
  $
30,896
    $
29,611
 
Other Noncurrent Liabilities [Table Text Block]
   
December 31,
 
   
2019
   
2018
 
Dispute related to royalty deductions
  $
4,687
    $
4,687
 
Dispute related to royalty-in-kind
   
250
     
2,235
 
Lease liability (Note 7)
   
4,419
     
 
Apache lawsuit (Note 18)
   
     
49,500
 
Uncertain tax positions including interest/penalties (Note 13)
   
     
11,523
 
Other
   
632
     
745
 
Total other liabilities (long-term)
  $
9,988
    $
68,690