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Income Taxes
12 Months Ended
Dec. 31, 2019
Income Tax Disclosure [Abstract]  
Income Taxes
8. Income Taxes
The components of the provision (benefit) for income taxes for the years ended December 31, 2019 and 2018 are as follows:
 
                        
     
Year Ended December 31,
 
(Thousands
 of
  dollars)
    
    2019    
  
    2018    
 
Current:
     
Federal
    
$
(1,798
)
 
 
$
(4,742
State
    
 
123
 
 
 
(146
    
 
 
  
 
 
 
Total current
    
 
(1,675
)
 
 
 
(4,888
Deferred:
     
Federal
    
 
3,536
 
 
 
7,620
 
State
    
 
(440
)
 
 
 
246
 
    
 
 
  
 
 
 
Total deferred
    
 
3,096
 
 
 
7,866
 
    
 
 
  
 
 
 
Total income tax provision
    
$
1,421
 
 
$
2,978
 
    
 
 
  
 
 
 
 
                        
   
At December 31,
 
(Thousands
 of
  dollars)
  
    2019    
     
    2018    
 
Deferred Tax Assets:
      
Accrued liabilities
  
$
614
 
    
$
519
 
Allowance for doubtful accounts
  
 
95
 
    
 
51
 
Derivative Contracts
  
 
110
 
    
 
0
 
Disallowed Interest Carryforwards
  
 
 
    
 
769
 
Alternative minimum tax credits
  
 
1,720
 
    
 
4,760
 
State Net operating loss carry-forwards
  
 
821
 
    
 
469
 
Percentage depletion carry-forwards
  
 
 
    
 
 
General Business Credits
  
 
 
    
 
137
 
  
 
 
     
 
 
 
Total deferred tax assets
  
 
3,360
 
    
 
6,705
 
Deferred Tax Liabilities:
      
Basis differences relating to managed partnerships
  
 
2,109
 
    
 
2,296
 
Depletion and depreciation
  
 
37,173
 
    
 
36,711
 
Derivative Contracts
  
 
 
    
 
526
 
  
 
 
     
 
 
 
Total deferred tax liabilities
  
 
39,282
 
    
 
39,533
 
  
 
 
     
 
 
 
Net deferred tax liabilities
  
$
35,922
 
    
$
32,828
 
  
 
 
     
 
 
 
The total provision for income taxes for the years ended December 31, 2019 and 2018 varies from the federal statutory tax rate as a result of the following:
 
                        
   
Year Ended December 31,
 
(Thousands
 of
  dollars)
  
        2019        
  
        2018        
 
Expected tax expense
  
$
1,028
 
 
$
3,676
 
Revaluation of deferred tax attributes
  
 
 
 
 
0
 
Executive Compensation
  
 
597
 
 
 
553
 
State income tax, net of federal benefit
  
 
(303
)
 
 
 
79
 
Percentage depletion
  
 
(341
)
 
 
 
(140
AMT and
Marginal Well Credits
  
 
436
 
 
 
(1,186
Other, net
  
 
4
 
 
 
(4
  
 
 
  
 
 
 
Total income tax provision (benefit)
  
$
1,421
 
 
$
2,978
 
  
 
 
  
 
 
 
Deferred income taxes reflect the impact of temporary differences between the amount of assets and liabilities recognized for financial reporting purposes and such amounts recognized for tax purposes.
 
On December 22, 2017, the U.S. enacted into legislation the Tax Cuts and Jobs Act (2017 Tax Act). Under the 2017 Tax Act, the company may use alternative minimum tax (AMT) credits to fully offset any regular tax liability. In addition, a portion of the minimum tax credit which exceeds the regular tax liability is refundable in future years. The refundable portion is 50% of any excess credit in the years
201
9
through 2020 and 100% in 2021. The Company expects to receive a refund of $1.720 million in 20
20
based on refundable credits claimed on the 201
9
return, and additional $1.720 million refunds of previously paid taxes on its tax returns for the years 20
20
and
2021.
The Company is entitled to marginal well production credits under Internal Revenue Code section 45I.
The Marginal Well Credit is phased out when oil and gas prices exceed certain levels. 
The Company is entitled to percentage depletion on certain of its wells, which is calculated without reference to the basis of the property. To the extent that such depletion exceeds a property’s basis, it creates a permanent difference, which lowers the Company’s effective rate. The availability of the percentage depletion deduction is phased out as an entity’s production exceeds certain levels, and based on the Company’s increasing production the percentage depletion deduction is becoming less significant.
The Company is allowed a credit against the Texas Franchise Tax based on net operating losses incurred in prior periods. The credits allowed are $89 thousand in the years 20
20
through 2026. Any credits not utilized in a given year due to the allowable credit exceeding the tax liability may be carried forward. No credit may be carried forward past 2026. The value of the credit is calculated net of the federal income tax effect.
The Company has not recorded any provision for uncertain tax positions. The Company files income tax returns in the U.S. federal jurisdiction and various state and local jurisdictions. The 2004, 2005, 2006, 2009 
and
2017 federal income tax returns have been audited by the Internal Revenue Service. Returns for unexamined earlier years may be examined and adjustments made to the amount of percentage depletion and AMT credit carryforwards flowing from those years into an open tax year, although in general no assessment of income tax may be made for those years on which the statute has closed. State returns for the years 2017 through 2019 remain open for examination by the relevant taxing authorities