Basis of Presentation (Details) - USD ($) $ in Thousands			6 Months Ended
	Mar. 07, 2017	Jan. 11, 2017	Jan. 31, 2017
Basis of Presentation (Textual)
Initial penalty payment		$ 15,000
Subsequent Event [Member]
Basis of Presentation (Textual)
Settlement of initial payment	$ 2,250
Additional settlement payment	$ 7,200
Straight Path [Member]
Basis of Presentation (Textual)
Ownership in straight path spectrum			100.00%
Straight Path IP Group [Member]
Basis of Presentation (Textual)
Ownership in straight path spectrum			84.50%