(Loss) Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015
Basic and Diluted weighted-average number of shares [Abstract]
Basic weighted-average number of shares	11,854	11,420	11,832	11,409
Effect of dilutive securities:
Shares underlying stock options				7
Non-vested restricted Class B common stock				421
Diluted weighted-average number of shares	11,854	11,420	11,832	11,837