Legal Proceedings (Details)	0 Months Ended	1 Months Ended			9 Months Ended	12 Months Ended
	May 05, 2004	Aug. 31, 2011 USD ($)	Feb. 15, 2011 USD ($) Patents	Oct. 27, 2010 USD ($)	Apr. 30, 2013 USD ($)	Jul. 31, 2012 USD ($)	Jul. 31, 2007 USD ($)	Mar. 15, 2013 USD ($)	Apr. 30, 2013 Lycatel [Member] USD ($)	Apr. 30, 2013 Lycatel [Member] EUR (€)	Apr. 30, 2013 Mox [Member] USD ($)	Apr. 30, 2013 Mox [Member] EUR (€)
Legal Proceedings (Textual)
Security Deposit									$ 300,000	€ 250,000	$ 2,000,000	€ 1,500,000
Damages from the Company in an action alleging infringement of two patents related to the activation of phone and gift card			9,100,000
Number of patents			2
Damages and interest awarded		10,100,000
Interest accrued rate		0.11%
Reduction of damages exclusive of interest (Percentage)					50.00%
Litigation expense						10,800,000
Interest on damages per annum (Percentage)								9.00%
Total amount of Final Award damages								5,400,000
Damages and interest paid							15,000,000
Potential termination costs							15,000,000
Approximate sought value for alleged damages and interest				25,000,000
Accrued litigation expense, aggregate amount					15,400,000
Reasonably possible liability related to claims for 15.1 million amount that has been accrued					$ 8,500,000
Term of indefeasible right to use	15 years