Schedule II (Details) - USD ($)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016		Jun. 30, 2015
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 96,868	$ 126,868		$ 136,868
Additions charged (credited) to cost and expenses		(30,000)	[1]	(10,000)	[1]
(Deductions)
Balance at end of period	96,868	96,868		126,868
Deferred Tax Valuation Allowance [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	628,730	628,730		6,132,147
Additions charged (credited) to cost and expenses				(1,111,693)
(Deductions)				(4,391,724)	[2]
Balance at end of period	$ 628,730	$ 628,730		$ 628,730

[1] Reduction in allowance for doubtful accounts due to adjustment in reserve balance.

[2] Reduction in deferred tax valuation allowance due to reevaluation of deferred tax assets.