Accounts Payable and Accrued Expenses (Details) - USD ($)	Jun. 30, 2018	Jun. 30, 2017
Payables and Accruals [Abstract]
Trade accounts payable	$ 24,818,000	$ 5,222,000
Clinical trial accruals	2,110,000	2,865,000
Executive severance liabilities	2,388,000	5,542,000
Reimbursement for proxy expenses	484,000	4,505,000
Contract manufacture organization expenses	0	3,769,000
Proxy defense-related expenses	0	6,967,000
Miscellaneous other current liabilities	1,864,000	2,497,000
Accounts payable and accrued expenses	$ 31,663,648	$ 31,366,976