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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified |  |  |  | 9 Months Ended
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Jul. 31, 2012 Globility Communications Corporation [Member] | Jul. 31, 2012 Globility Canada [Member] | Jul. 02, 2012 Contingent Value Rights ("CVRs") [Member] | Jul. 01, 2009 Contingent Value Rights ("CVRs") [Member] | Sep. 30, 2013 Fiber Optic and Submarine Cable [Member] Minimum [Member] | Sep. 30, 2013 Fiber Optic and Submarine Cable [Member] Maximum [Member] | Sep. 30, 2013 Network Equipment [Member] Minimum [Member] | Sep. 30, 2013 Network Equipment [Member] Maximum [Member] | Sep. 30, 2013 Furniture and Equipment [Member]
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Percentage ownership through direct and indirect ownership structures | 45.60% |  |  |  |  |  |  |  |
Purchase of Globility in Canada |  | 54.40% |  |  |  |  |  |  |
Estimated useful lives of property and equipment |  |  |  |  | 8 years | 25 years | 5 years | 8 years | 5 years
Total common stock shares issued |  |  | 3,657,157 | 2,665,000 |  |  |  |  |
Price per common stock shares issued |  |  | $ 26.20 | $ 35.95 |  |  |  |  |
Estimated fair value recorded in "other liabilities" |  |  |  | $ 2.6 |  |  |  |  |

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