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Acquisitions | 12 Months Ended
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Dec. 31, 2015
Acquisitions [Abstract] |
Acquisitions | Note 2—Acquisitions In December 2013, IDT Energy acquired 100% of the outstanding membership interests of Diversegy, LLC (“Diversegy”), a retail energy advisory and brokerage company that serves commercial and industrial customers, and Epiq Energy, LLC, which was subsequently renamed IDT Energy Network (“IDTEN”), a network marketing company that provides independent representatives with the opportunity to build sales organizations and to profit from both residential and commercial energy. Operating results of the acquired entities from the date of acquisition, which were not significant, are included in the Company’s consolidated financial statements. All of the Company’s goodwill at December 31, 2015 and 2014 was attributable to the GRE segment. The table below reconciles the change in the carrying amount of goodwill for the period from December 31, 2012 to December 31, 2015:
(in thousands) |  |
Balance at December 31, 2012 |  | $ | 3,663 |
Acquisitions |  |  | 3,686 |
Balance at December 31, 2013 |  |  | 7,349 |
Adjustment |  |  | (124 | )
Impairment |  |  | (3,562 | )
Balance at December 31, 2014 |  |  | 3,663 |
Change in carrying amount |  |  | — |
Balance at December 31, 2015 |  | $ | 3,663 |
In the year ended December 31, 2014, the annual goodwill impairment test resulted in the impairment of the goodwill of the Diversegy and IDTEN reporting unit primarily because of continuing losses since the acquisitions. The goodwill impairment of $3.6 million recorded in the year ended December 31, 2014 reduced the carrying amount of the goodwill of the Diversegy and IDTEN reporting unit to zero. The Company estimated the fair value of the reporting unit and compared the estimated fair value to the reporting unit’s carrying amount. The Company measured the fair value of the reporting unit by discounting its estimated future cash flows using an appropriate discount rate. Since the carrying value of the reporting unit including goodwill exceeded the estimated fair value, the Company performed the required additional steps and determined that the goodwill was fully impaired. The following table presents unaudited pro forma information of the Company as if the acquisition occurred as of the beginning of the period:
(in thousands) |  | Year ended December 31, 2013
Revenues |  | $ | 280,307 |
Net loss |  | $ | (6,408 | )

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