Description of Business and Summary of Significant Accounting Policies (Details) - shares shares in Thousands	12 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Description of Business and Summary of Significant Accounting Policies [Abstract]
Basic weighted-average number of shares	11,871	11,457	10,667
Effect of dilutive securities:
Stock options			9
Non-vested restricted Class B common stock			591
Diluted weighted-average number of shares	11,871	11,457	11,267