Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Jun. 30, 2014
Allowance for doubtful accounts	$ 766	$ 704
Common Class A [Member]
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, authorized (in shares)	20,000,000	20,000,000
Common stock, outstanding (in shares)	6,198,381	6,165,838
Common Class B [Member]
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, authorized (in shares)	10,000,000	10,000,000
Common stock, outstanding (in shares)	790,683	794,990