Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating Loss Carryforwards [Line Items]
Deferred tax assets valuation allowance	$ 10,899,617	$ 10,868,032
Unrecognized tax benefits income tax penalties and interest expense	0	0
Unrecognized tax benefits income tax penalties and interest accrued	0	0
Deferred federal income taxes from proper use of bad debt reserves	0	0
Bad debt deductions for income tax purposes included in retained earnings	7,800,000	7,800,000
Deferred state income taxes from proper use of bad debt reserves	0	0
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	31,500,000	32,700,000
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 46,900,000	$ 47,500,000