Preferred Stock - Schedule of Preferred Stock (Details) - USD ($)	Mar. 31, 2018	Jun. 30, 2017
Auction Market Preferred Securities, Stock Series [Line Items]
Preferred Stock, Shares Authorized (shares)	500,000	500,000
Preferred stock, par value (in US$ per share)	$ 1	$ 1
Preferred Stock, Liquidation Preference, Value	$ 820,554	$ 0
Series A Preferred Stock [Member]
Auction Market Preferred Securities, Stock Series [Line Items]
Preferred Stock, Shares Authorized (shares)	21,000
Preferred stock, issued (in shares)	14,700
Preferred stock, par value (in US$ per share)	$ 1
Preferred Stock, Value, Outstanding	$ 14,700
Cumulative Dividends	257,250
Preferred Stock, Liquidation Preference, Value	$ 820,554