CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Mar. 31, 2013	Jun. 30, 2012
Common class A [Member]
Common stock, par value	$ 0.025	$ 0.025
Common stock, shares authorized	28,000,000	28,000,000
Common stock, shares issued	13,864,961	13,862,505
Treasury stock	449,748	472,685
Common class B [Member]
Common stock, par value	$ 0.025	$ 0.025
Common stock, shares authorized	4,500,000	4,500,000
Common stock, shares issued	0	0
Common class C Convertible stock [Member]
Common stock, par value	$ 0.025	$ 0.025
Common stock, shares authorized	3,500,000	3,500,000
Common stock, shares issued	2,070,587	2,073,043