Stockholders' Equity (Details) (USD $)	1 Months Ended		9 Months Ended			9 Months Ended		12 Months Ended		1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended	1 Months Ended		9 Months Ended
	Oct. 03, 2013	Mar. 28, 2013	Apr. 30, 2014	Apr. 30, 2013	Jul. 31, 2013	Apr. 30, 2014 Common Stock [Member]	Apr. 30, 2013 Treasury Stock [Member]	Jul. 31, 2013 Treasury Stock [Member]	Jul. 31, 2013 Additional Paid-in Capital [Member]	Nov. 26, 2013 Senior Officers [Member]	Apr. 30, 2014 Senior Officers [Member]	Jan. 17, 2014 Senior Officers and Board of Directors [Member]	Apr. 30, 2014 Senior Officers and Board of Directors [Member]	Feb. 03, 2014 Executive Officers [Member]	Jan. 17, 2014 Executive Officers [Member]	Apr. 30, 2014 Executive Officers [Member]
Stockholders' Equity (Details) [Line Items]
Common Stock, Par or Stated Value Per Share (in Dollars per share)		$ 0.01	$ 0.01		$ 0.01
Maximum Offering Price Under Sales Agreement (in Shares)		20,000,000
Percentage of Commission Payable on Equity Offering		3.00%
Stock Issued During Period, Shares, New Issues (in Shares)						3,018,112
Average Sale Price of Stock (in Dollars per share)			$ 3.14
Proceeds from Issuance of Common Stock (in Dollars)			$ 9,455,000	$ 3,000
Excess Tax Benefit from Share-based Compensation, Financing Activities (in Dollars)			0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)	10,000		665,117							271,591		267,797		20,000	95,729
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)	$ 2.53		$ 2.82							$ 3.00		$ 2.70		$ 2.75	$ 2.70
Share Based Compensation Arrangement by Share Based Payment Award Options Term	5 years									4 years		5 years		5 years	5 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years									1 year		2 years		3 years	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)	$ 1.23									$ 0.66		$ 1.05		$ 1.11	$ 1.10
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	4 years 9 months									2 years 6 months		3 years 3 months		3 years 6 months	3 years 6 months
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	57.60%									54.79%		54.78%		55.07%	55.45%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	1.30%									0.42%		0.90%		0.84%	1.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Payments (in Dollars)	0									0		0		0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares (in Shares)			0								0		0			0
Number of Officers										2		2
Share Based Compensation Arrangement by Share Based Payment Award Options Awarded to Set off Compensation Liability in Lieu of Cash (in Dollars)										200,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options (in Dollars)			400,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			16 months
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)			100,000
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Outstanding Weighted Average Remaining Contractual Terms			1 year
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)			1,664,000
Stock Issued During Period, Shares, Treasury Stock Reissued (in Shares)							216,556
Stock Issued During Period, Shares, Employee Benefit Plan (in Shares)			165,646	9,419		165,646
Payments of Stock Issuance Costs (in Dollars)			636,000	643,000
Stock Issued During Period, Value, Treasury Stock Reissued (in Dollars)								$ 3,074,000	$ 2,458,000