Income Taxes - Additional information (Details) - USD ($)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Operating Loss Carryforwards [Line Items]
Income Tax Expense (Benefit)	$ 20,867	$ (5,053,833)	$ 58,229
Operating loss carryforward resulting from sale	0	$ 66,200,000	$ 0
Deferred tax assets tax credit carryforwards research and development	1,500,000
Operating loss carry forwards for federal income tax	371,100,000
Operating loss carry forwards for state income tax	$ 186,000,000
Minimum
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards expiration year	2019
Maximum
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards expiration year	2037