Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Jun. 30, 2014
Allowance for doubtful accounts	$ 603	$ 704
Common Class A [Member]
Class A Common stock, par value (in dollars per share)	$ 1	$ 1
Class A Common stock, Authorized (in shares)	20,000,000	20,000,000
Class A Common stock, Outstanding (in shares)	6,215,042	6,165,838
Common Class B [Member]
Class A Common stock, par value (in dollars per share)	$ 1	$ 1
Class A Common stock, Authorized (in shares)	10,000,000	10,000,000
Class A Common stock, Outstanding (in shares)	776,488	794,990