Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - $ / shares	Dec. 31, 2015	Jun. 30, 2015
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	2,500,000	2,500,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	75,000,000	75,000,000
Common stock, shares outstanding (in shares)	20,700,673	20,743,973
Common stock, shares issued (in shares)	21,864,548	21,864,548
Treasury stock, shares at cost (in shares)	1,163,875	1,120,575