Income Taxes	3 Months Ended
Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We file a consolidated federal income tax return in the United States and various combined and separate filings in several state and local jurisdictions. There were neither unrecognized tax benefits nor any accrued interest or penalties associated with unrecognized tax benefits during the three months ended September 30, 2017. We believe we have appropriate support for the income tax positions taken and to be taken on our tax returns and that the accruals for tax liabilities are adequate for all open years based on our assessment of various factors including past experience and interpretations of tax law applied to the facts of each matter. The Company’s federal and state income tax returns are open to audit under the statute of limitations for the years ended June 30, 2014 through June 30, 2016 for federal tax purposes and for the years ended June 30, 2013 through June 30, 2016 for state tax purposes. To the extent we utilize net operating losses generated in earlier years, such earlier years may also be subject to audit. We recognized income tax expense of $390,322 and $889,176 for the three months ended September 30, 2017 and 2016, respectively, with corresponding effective tax rates of 15% and 33%. Our effective tax rate will typically differ from the statutory federal rate as a result of state income taxes, primarily in the State of Louisiana, and differences related to percentage depletion in excess of basis, stock-based compensation and other permanent differences. The effective tax rate for the three months ended September 30, 2017 was significantly lower than the statutory federal rate as a result of percentage depletion in excess of basis and the tax effects of stock-based compensation, partially offset by state income taxes net of federal benefit. Our quarterly income tax provisions are based on our reasonable estimates of income taxes payable at the end of the year. These estimates involve uncertainties and our estimated interim effective tax rates may change as additional financial results become available during the year. In particular, the utilization of excess percentage depletion is limited to 65% of actual taxable income and is subject to greater uncertainty than other components of our tax provision.

Income Taxes

We file a consolidated federal income tax return in the United States and various combined and separate filings in several state and local jurisdictions.

There were neither unrecognized tax benefits nor any accrued interest or penalties associated with unrecognized tax benefits during the three months ended September 30, 2017. We believe we have appropriate support for the income tax positions taken and to be taken on our tax returns and that the accruals for tax liabilities are adequate for all open years based on our assessment of various factors including past experience and interpretations of tax law applied to the facts of each matter. The Company’s federal and state income tax returns are open to audit under the statute of limitations for the years ended June 30, 2014 through June 30, 2016 for federal tax purposes and for the years ended June 30, 2013 through June 30, 2016 for state tax purposes. To the extent we utilize net operating losses generated in earlier years, such earlier years may also be subject to audit.

We recognized income tax expense of $390,322 and $889,176 for the three months ended September 30, 2017 and 2016, respectively, with corresponding effective tax rates of 15% and 33%. Our effective tax rate will typically differ from the statutory federal rate as a result of state income taxes, primarily in the State of Louisiana, and differences related to percentage depletion in excess of basis, stock-based compensation and other permanent differences. The effective tax rate for the three months ended September 30, 2017 was significantly lower than the statutory federal rate as a result of percentage depletion in excess of basis and the tax effects of stock-based compensation, partially offset by state income taxes net of federal benefit. Our quarterly income tax provisions are based on our reasonable estimates of income taxes payable at the end of the year. These estimates involve uncertainties and our estimated interim effective tax rates may change as additional financial results become available during the year. In particular, the utilization of excess percentage depletion is limited to 65% of actual taxable income and is subject to greater uncertainty than other components of our tax provision.