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Supplemental Disclosure of Cash Flow Information
12 Months Ended
Jun. 30, 2018
Supplemental Cash Flow Elements [Abstract]  
Supplemental Disclosure of Cash Flow Information
Supplemental Disclosure of Cash Flow Information
Our supplemental disclosures of cash flow information for the years ended June 30, 2018, 2017, and 2016 are as follows:
 
June 30,
 
2018
 
2017
 
2016
Income taxes paid
$
1,826,754

 
$
1,495,377

 
$
540,000

Income tax refunds

 

 
1,556,999

Non-cash transactions:
 
 
 
 
 
Increase (decrease) in accrued purchases of property and equipment
1,695,218

 
(3,076,245
)
 
(2,250,048
)
Deferred loan costs charged to oil and gas property costs

 

 
107,196

Oil and natural gas property costs attributable to the recognition of asset retirement obligations
43,922

 
471,864

 
140,151

Mengel working interest acquired in Delhi Field litigation settlement

 

 
596,500

Royalty rights acquired through non-monetary exchange of patent and trademark assets

 

 
108,512

Previously acquired Company shares swapped by holders to pay stock option exercise price

 
77,156

 
76,500

Accrued purchases of treasury stock

 

 
(170,283
)