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Stock-based Payment Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Millions			1 Months Ended	9 Months Ended
	Apr. 15, 2015	Dec. 16, 2014	Oct. 31, 2013	Apr. 30, 2017	Apr. 30, 2016	Jan. 31, 2014
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Number of stock options exercised				20,598,000
Stock Based Compensation (Textual)
Shares available for calculating intrinsic value (in shares)				18,841,251
Nonqualified stock options to purchase of shares, exercise price			$ 17.81
Term for not granting cash salary or bonus compensation in excess of $ 1.00 per year			5 years
Deferred compensation arrangement with individual - requisite service period			5 years
Deferred compensation arrangement with individual, description				Each option will become fully vested, assuming continued service on April 15, 2019 and December 16, 2018.
Percentage of stock options which would get immediately vested on change of control			100.00%
Fair value of option at grant date (in dollars per share)			$ 5.72
Total compensation expense to be recognized per grant						$ 40.0
Compensation expense				$ 5.6	$ 5.6
A. Jayson Adair, the Chief Executive Officer
Stock Based Compensation (Textual)
Nonqualified stock options to purchase of shares						4,000,000
Vincent W. Mitz, the President
Stock Based Compensation (Textual)
Nonqualified stock options to purchase of shares						3,000,000
Tranche One on December 16, 2014 | A. Jayson Adair, the Chief Executive Officer
Stock Based Compensation (Textual)
Percentage of total aggregate options vested		20.00%
Tranche Two on April 15, 2015 | A. Jayson Adair, the Chief Executive Officer
Stock Based Compensation (Textual)
Percentage of total aggregate options vested	20.00%
Tranche Three Vesting Monthly | A. Jayson Adair, the Chief Executive Officer
Stock Based Compensation (Textual)
Award vesting period			4 years

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Stock based Compensation

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Represents the term for granting stock in excess of cash salary or bonus in excess of dollar one.

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The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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Description of the deferred compensation arrangement, including fixed amounts and determinable awards, or the method for determining payments and awards, the timing of such payments and awards, and any requisite service or performance criteria, as of the balance sheet date.

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Minimum period the individual is required to perform services to be fully vested under the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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