Common Stock and Stock Options (Details Textual) (USD $)	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Common Stock and Stock Options (Textual) [Abstract]
Period to purchase common stock options	maximum of ten years (five years in the case of options granted to a person possessing more than 10% of the combined voting power of the company as of the date of grant)
Shares reserved for future exercise and grant of stock options and restricted stock awards	3,226,374
Shares reserved for outstanding stock awards	2,800,000
Purchase of treasury stock	$ (1,977,000)	$ (8,577,000)	$ (6,122,000)
Stock Repurchased	300,000	1,600,000	1,200,000
Authorization of stock repurchase plan			10,000,000
Available cost of common stock	$ 1,400,000
Vesting period for stock option	4 years
Incentive Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Description	The exercise price for incentive stock options may not be less than fair market value of the common stock on the date of the grant (110% of fair market value in the case of options granted to a person possessing more than 10% of the combined voting power of the Company).
Nonqualified stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Description	The exercise price for nonqualified stock options may not be less than 85% of the fair market value of the common stock on the date of the grant (110% of fair market value in the case of options granted to a person possessing more than 10% of the combined voting power of the Company).