Income Taxes - Reconciliation of Statutory and Income Tax Expense (Details) - USD ($)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax provision (benefit) computed at the statutory federal rate	$ 788,776	$ 3,960,480
Return to provision adjustments including returns amended for EOR credits	(2,823,527)	0
Depletion in excess of tax basis	(412,215)	(982,302)
State income taxes, net of federal tax benefit	272,962	593,533
Permanent differences related to stock-based compensation and other	22,408	(73,671)
Expiration of Section 382 tax loss carryforwards	0	127,410
Change in valuation allowance for Section 382 tax loss carryforwards	0	(127,410)
Other	(29,400)	(15,679)
Total income tax provision	$ (2,180,996)	$ 3,482,361
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Income tax (benefit) provision computed at the statutory federal rate	21.00%	21.00%
Return to provision adjustments including returns amended for EOR credits	(75.20%)	0.00%
Depletion in excess of tax basis	(11.00%)	(5.10%)
State income taxes, net of federal tax benefit	7.30%	3.10%
Permanent differences related to stock-based compensation and other	0.60%	(0.40%)
Expiration of Section 382 tax loss carryforwards	0.00%	0.70%
Change in valuation allowance for Section 382 tax loss carryforwards	0.00%	(0.70%)
Other	(0.80%)	(0.10%)
Income tax provision (benefit)	(58.10%)	18.50%