CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2016	Jun. 30, 2016
Statement of Financial Position [Abstract]
Preferred stock, par value (in US$ per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	500,000	500,000
Preferred stock, issued (in shares)	0	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)	16,826,377	16,781,561
Common stock, shares outstanding (in shares)	16,826,377	16,781,561