Related Party Transactions (Details Textual) (IDT [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
Jul. 31, 2013	Jul. 31, 2012
IDT [Member]
Related Party Transactions (Textual)
Payroll, benefits, insurance, facilities and other expenses	$ 0.7	$ 1.1
Regulatory fees	$ 0.1	$ 0.1

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Name:	us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration