Description of Business and Summary of Significant Accounting Policies (Details) - shares shares in Thousands	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Description of Business and Summary of Significant Accounting Policies [Abstract]
Basic weighted-average number of shares	11,457	10,667	10,504
Effect of dilutive securities:
Stock options		9
Non-vested restricted Class B common stock		591
Diluted weighted-average number of shares	11,457	11,267	10,504