Earnings Per Share (Details) - USD ($)	3 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Earnings Per Share [Abstract]
Repurchases of common stock (in shares)	0	0
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average performance shares outstanding during the period that are excluded from EPS Calculation (in shares)	227,000	145,000
Net (loss) income for basic calculation	$ (2,489,000)	$ 1,439,000
Numerator for diluted calculation	$ (2,489,000)	$ 1,439,000
Denominator for basic calculation (in shares)	23,385,000	16,171,000
Dilutive effect on shares of stock-based awards (in shares)	0	23,000
Denominator for diluted calculation (in shares)	23,385,000	16,194,000
Stock options, performance shares (with the performance conditions satisfied), RSUs and restricted stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive equity-classified stock-based awards not included in calculation of diluted earnings per share (in shares)	2,419,000	2,365,000