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Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2013
Cash Flows From Operating Activities |  |  |
Net income attributable to the Company | $ 4,991,857 | $ 3,597,313 | $ 6,628,428
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation, depletion and amortization | 3,664,373 | 1,272,778 | 1,341,055
Stock-based compensation | 943,653 | 1,352,322 | 1,531,745
Stock-based compensation related to restructuring | 0 | 376,365 | 0
Accretion of discount on asset retirement obligations | 34,866 | 41,626 | 72,312
Settlement of asset retirement obligations | (223,564) | (315,952) | (90,531)
Deferred income taxes | 1,422,489 | 1,344,812 | 2,512,978
Deferred rent | (17,145) | (17,145) | (17,146)
Loss on derivative instruments, net | 109,974 | 0 | 0
Changes in operating assets and liabilities: |  |  |
Receivables from oil and natural gas sales | (1,666,009) | 176,707 | (289,506)
Receivables from income taxes and other | 748 | 281,822 | (189,813)
Due from joint interest partners | 0 | 49,063 | 47,088
Prepaid expenses and other current assets | 378,049 | (480,899) | (33,121)
Accounts payable and accrued expenses | 551,452 | 663,645 | 278,436
Income taxes payable | 190,032 | (233,548) | 141,581
Net cash provided by operating activities | 10,380,775 | 8,108,909 | 11,933,506
Cash flows from investing activities |  |  |
Proceeds from asset sales | 398,242 | 542,347 | 3,479,976
Development of oil and natural gas properties | (4,890,909) | (966,931) | (4,163,080)
Acquisitions of oil and natural gas properties | 0 | (59,315) | (755,194)
Capital expenditures for technology and other equipment | (313,059) | (312,890) | 0
Maturities of certificates of deposit | 0 | 250,000 | 0
Other assets | (236,559) | (202,017) | (32,160)
Net cash used by investing activities | (5,042,285) | (748,806) | (1,470,458)
Cash flows from financing activities |  |  |
Proceeds from the exercise of stock options | 141,600 | 3,252,801 | 70,719
Acquisitions of treasury stock | (333,841) | (1,655,251) | (137,818)
Common stock dividends paid | (9,833,642) | (9,723,833) | 0
Preferred stock dividends paid | (674,302) | (674,302) | (674,302)
Deferred loan costs | (94,075) | (63,535) | (16,211)
Tax benefits related to stock-based compensation | 1,633,946 | 509,096 | 794,569
Other | 67 | 6,850 | 32
Net cash provided (used) by financing activities | (9,160,247) | (8,348,174) | 36,989
Net increase (decrease) in cash and cash equivalents | (3,821,757) | (988,071) | 10,500,037
Cash and cash equivalents, beginning of year | 23,940,514 | 24,928,585 | 14,428,548
Cash and cash equivalents, end of year | $ 20,118,757 | $ 23,940,514 | $ 24,928,585

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- Definition The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3095-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3098-108585 + Details
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- Definition The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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