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Consolidated Condensed Statements of Cash Flows - USD ($)	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities
Net income attributable to the Company	$ 5,795,801	$ 2,140,532
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	1,552,249	1,554,189
Stock-based compensation	215,373	487,484
Deferred income tax expense	275,380	19,513
Changes in operating assets and liabilities:
Receivables	(392,981)	(300,581)
Prepaid expenses and other current assets	(415,729)	96,296
Accounts payable and accrued expenses	(427,113)	(166,904)
Income taxes payable	1,053,032	370,745
Net cash provided by operating activities	7,656,012	4,201,274
Cash flows from investing activities
Capital expenditures for oil and natural gas properties	(3,089,006)	(508,042)
Net cash used in investing activities	(3,089,006)	(508,042)
Cash flows from financing activities
Cash dividends to common stockholders	(3,315,785)	(2,481,471)
Common share repurchases, including shares surrendered for tax withholding	(89,992)	(110,753)
Net cash used in financing activities	(3,405,777)	(2,592,224)
Net increase in cash, cash equivalents and restricted cash	1,161,229	1,101,008
Cash, cash equivalents and restricted cash, beginning of period	27,681,133	23,028,153
Cash, cash equivalents and restricted cash, end of period	28,842,362	24,129,161
Supplemental disclosures of cash flow information:
Income taxes paid	462,395	0
Non-cash transactions:
Change in accounts payable used to acquire property and equipment	(405,645)	114,729
Oil and natural gas property costs incurred through recognition of asset retirement obligations	$ 31,268	$ 0

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