Equity (Details) (USD $)
In Thousands, unless otherwise specified

12 Months Ended

Jul. 31, 2014

Equity (Textual)

Common stock, conversion basis

Each share of Class A common stock may be converted into one share of Class B common stock, at any time, at the option of the holder. Shares of Class A common stock are subject to certain limitations on transferability that do not apply to shares of Class B common stock.

Common stock issued for exercises of stock options

$ (17)

Class A common stock [Member] | Common Stock [Member]

Equity (Textual)

Common stock, voting rights

Shares of Class A common stock are entitled to three votes per share.

Class B common stock [Member] | Common Stock [Member]

Equity (Textual)

Common stock, voting rights

Shares of Class B common stock are entitled to one-tenth of a vote per share.

Common stock issued for compensation, Shares

311

Common stock issued for exercises of stock options, Shares

3

Common stock issued for exercises of stock options

Common stock issued for deferred stock units, Shares

9

Retirement of common stock issued to former employees of IDT Corporation, Shares

(3)