Income Taxes (Details) (USD $)	6 Months Ended
	Jan. 31, 2015	Jul. 31, 2014
Income Tax Disclosure [Abstract]
Effective income tax rate, continuing operations, excluding discrete adjustments	34.75%
Unrecognized tax benefits	$ 3,075,000	$ 2,743,000
Total unrecognized tax benefits recorded as non-current income taxes payable	1,980,000	2,743,000
Interest accrued relating to income taxes	57,000	40,000
Unrecognized tax benefits that would positively impact our effective tax rate, if recognized	2,373,000	2,152,000
Accounting Standards Update 2013-11 | Deferred Tax Liability Noncurrent
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New accounting pronouncement, effect of adoption, quantification	$ 1,095,000