CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 30, 2015	Jun. 30, 2014
Common Class A [Member]
Common stock, par value (in dollars per share)	$ 0.025	$ 0.025
Common stock, shares authorized	28,000,000	28,000,000
Common stock, shares issued	13,866,421	13,866,361
Treasury stock, shares	555,786	501,518
Common Class B [Member]
Common stock, par value (in dollars per share)	$ 0.025	$ 0.025
Common stock, shares authorized	4,500,000	4,500,000
Common stock, shares issued	0	0
Common Class C [Member]
Common stock, par value (in dollars per share)	$ 0.025	$ 0.025
Common stock, shares authorized	3,500,000	3,500,000
Common stock, shares issued	2,069,127	2,069,187