Line of credit facility	9 Months Ended
Apr. 30, 2013
Line Of Credit Facility [Abstract]
Line of Credit Facility	Note 10—Line of Credit Facility Effective July 30, 2012, the Company’s subsidiary, IDT Telecom, Inc., entered into a credit agreement, dated July 12, 2012, with TD Bank, N.A. for a line of credit facility for up to a maximum principal amount of $25.0 million. IDT Telecom may use the proceeds to finance working capital requirements, acquisitions and for other general corporate purposes. The line of credit facility is secured by primarily all of IDT Telecom’s assets. The principal outstanding bears interest per annum, at the option of IDT Telecom, at either (a) the U.S. Prime Rate less 125 basis points, or (b) the LIBOR rate adjusted by the Regulation D maximum reserve requirement plus 150 basis points. Interest is payable monthly and all outstanding principal and any accrued and unpaid interest is due on the maturity date of July 11, 2014. IDT Telecom pays a quarterly unused commitment fee of 0.375% per annum on the average daily balance of the unused portion of the $25.0 million commitment. IDT Telecom is required to comply with various affirmative and negative covenants as well as maintain certain financial targets and ratios during the term of the line of credit, including IDT Telecom may not pay any dividend on its capital stock and IDT Telecom’s aggregate loans and advances to affiliates or subsidiaries may not exceed $70.0 million. In March 2013, IDT Telecom borrowed $8.0 million, which incurred interest at LIBOR plus 150 basis points, or 1.7037% per annum. In April 2013, IDT Telecom repaid the $8.0 million. At April 30, 2013, there were no amounts borrowed or utilized for letters of credit under the line of credit, IDT Telecom was in compliance with all of the covenants, and IDT Telecom’s aggregate loans and advances to affiliates and subsidiaries was $54.5 million.

Effective July 30, 2012, the Company’s subsidiary, IDT Telecom, Inc., entered into a credit agreement, dated July 12, 2012, with TD Bank, N.A. for a line of credit facility for up to a maximum principal amount of $25.0 million. IDT Telecom may use the proceeds to finance working capital requirements, acquisitions and for other general corporate purposes. The line of credit facility is secured by primarily all of IDT Telecom’s assets. The principal outstanding bears interest per annum, at the option of IDT Telecom, at either (a) the U.S. Prime Rate less 125 basis points, or (b) the LIBOR rate adjusted by the Regulation D maximum reserve requirement plus 150 basis points. Interest is payable monthly and all outstanding principal and any accrued and unpaid interest is due on the maturity date of July 11, 2014. IDT Telecom pays a quarterly unused commitment fee of 0.375% per annum on the average daily balance of the unused portion of the $25.0 million commitment. IDT Telecom is required to comply with various affirmative and negative covenants as well as maintain certain financial targets and ratios during the term of the line of credit, including IDT Telecom may not pay any dividend on its capital stock and IDT Telecom’s aggregate loans and advances to affiliates or subsidiaries may not exceed $70.0 million. In March 2013, IDT Telecom borrowed $8.0 million, which incurred interest at LIBOR plus 150 basis points, or 1.7037% per annum. In April 2013, IDT Telecom repaid the $8.0 million. At April 30, 2013, there were no amounts borrowed or utilized for letters of credit under the line of credit, IDT Telecom was in compliance with all of the covenants, and IDT Telecom’s aggregate loans and advances to affiliates and subsidiaries was $54.5 million.