Other Operating Expense, Net (Details Textual) - USD ($)	1 Months Ended	12 Months Ended
	Oct. 24, 2017	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2017
Related Party Transaction [Line Items]
Sale of majority interests in New SPIP			$ 6,000,000
Payment for transfer of the IP Interest			(6,000,000)
Recorded expense for rendemnification		300,000
Accrual for non-income related taxes		8,000,000
Straight Path [Member]
Related Party Transaction [Line Items]
Expense related to legal settlement and mutual release, including legal fees				10,000,000
Legal fees related to the FCC investigation				900,000
Proceeds related to FCC investigation		2,300,000		$ 500,000
Legal fees		$ 2,000,000	$ 1,700,000
Aggregate cash paid	$ 16,000,000
Intellectual property net proceeds receive percentage	22.00%
Settlement agreement, description		The Settlement Agreement and Release allocates (i) $10 million of the payment and the retained interest right to the settlement of claims and the mutual release and (ii) $6 million to the transfer of the IP Interest.
Payment for settlement of claims and mutual release	$ 10,000,000
Payment for transfer of the IP Interest	6,000,000
Pr Sp Ip Holdings Llc [Member]
Related Party Transaction [Line Items]
Sale of majority interests in New SPIP	$ 6,000,000