CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Mar. 31, 2018	Jun. 30, 2017
Preferred stock, par value (in US$ per share)	$ 1	$ 1
Preferred Stock, Shares Authorized (shares)	500,000	500,000
Preferred Stock, Liquidation Preference, Value	$ 820,554	$ 0
Common stock, par value (in US$ per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	25,000,000	25,000,000
Common stock, shares issued (in shares)	16,927,988	16,846,002
Common stock, shares outstanding (in shares)	16,927,988	16,846,002
Cumulative Preferred Stock [Member]
Preferred Stock, Shares Authorized (shares)	21,000	0
Preferred stock, issued (in shares)	14,700	0