CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2017	Jun. 30, 2017
Preferred stock, par value (in US$ per share)	$ 1	$ 1
Preferred Stock, Shares Authorized	500,000	500,000
Preferred Stock, liquidation preference per share (in US$ per share)	$ 38.32
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)	16,889,667	16,846,002
Common stock, shares outstanding (in shares)	16,889,667	16,846,002
Cumulative Preferred Stock [Member]
Preferred Stock, Shares Authorized	21,000	0
Preferred stock, issued (in shares)	14,700	0