Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2023	Jun. 30, 2022
Receivables allowance	$ 911	$ 1,041
Accumulated depreciation	192,129	188,530
Accumulated Amortization	$ 53,552	$ 54,553
Treasury stock (in shares)	6,615,000	6,179,000
Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.05	$ 0.05
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	167,000	167,000
Class B Common Stock
Common stock, par value (in dollars per share)	$ 0.05	$ 0.05
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	42,856,000	42,856,000