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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified					9 Months Ended
	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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Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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