Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015
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)	6,236,900	6,223,558
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)	772,500	789,069
Allowance for doubtful accounts	$ 746	$ 612