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Discontinued Operations (Details Textual) $ in Millions	1 Months Ended
	Jul. 31, 2013 USD ($)
Straight Path IP Group, Inc [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage at the time of spin-off	84.50%
Straight Path Spectrum, Inc. [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage at the time of spin-off	100.00%
Straight Path Communications Inc. [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued operations amount spin off funding	$ 15

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Discontinued operations spin off funding.

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Ownership interest percentage at the time of spin-off under discontinued operations.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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