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Commitments and Contingencies (Details Textual)
 1 Months Ended 12 Months Ended
Oct. 11, 2017
USD ($)
Jul. 11, 2017
USD ($)
May 11, 2017
Apr. 11, 2017
USD ($)
Mar. 07, 2017
Feb. 11, 2017
USD ($)
Jan. 11, 2017
USD ($)
Installments
May 31, 2015
USD ($)
Oct. 31, 2014
USD ($)
Sep. 24, 2014
Patent
Aug. 31, 2013
USD ($)
May 29, 2012
Jul. 31, 2017
USD ($)
Jul. 31, 2016
USD ($)
License
Jul. 31, 2015
USD ($)
Commitments and Contingencies (Textual)                              
License expiration date                 Oct. 31, 2017         Dec. 31, 2018  
Monthly rent               $ 575     $ 600        
Annual rent               $ 7,700 $ 37,200         $ 18,000  
Extended term date, description              
May 31, 2015 to May 31, 2017 and again to May 31, 2019
 In March 2015, the term of the lease was extended to April 30, 2018.            
Lease agreement, description                     The monthly rental is currently $600. In addition, the Company currently leases space on two additional roofs for some of its telecom equipment as part of its Spectrum operations. The total monthly rental for these two roofs is $500.        
Rental expense, operating leases                         $ 51,758 $ 51,543 $ 40,685
Infringe of patents | Patent                   4          
FCC consent decree payable                         3,500,000    
Payment to consent decree, percentage     20.00%                        
Payment of penalty                         85,000,000    
Additional payment                         85,000,000    
Loans from lenders                         $ 17,500,000    
Description of legal settlement agreement         The Company will provide for a $2.25 million initial payment (the "Initial Payment") and a $7.2 million additional payment (the "Additional Payment"). The Initial Payment will be paid into an escrow account within 15 days following preliminary court approval of the settlement, and will be fully covered by insurance policies maintained by the Company. The Additional Payment of $7.2 million will be paid within 60 days after the closing of a transaction to sell the Company's spectrum licenses as specified in the Consent Decree with the FCC, or, in the event that the Company pays the non-transfer penalty specified in the Consent Decree, within 60 days after that payment is paid.                    
Description of monthly fee                           Straight Path IP Group will pay one of the law firms a monthly fee of $100,000 that is non-refundable but creditable against any contingency fee payment that may be due to the law firm in the future.  
Percentage of profit share                       20.00%      
Minimum [Member]                              
Commitments and Contingencies (Textual)                              
Recoverable contingency patents allegedly infringed, percentage                         0.00%    
Maximum [Member]                              
Commitments and Contingencies (Textual)                              
Recoverable contingency patents allegedly infringed, percentage                         40.00%    
Straight Path Spectrum [Member] | LMDS 28 GHz range [Member] | NEW YORK                              
Commitments and Contingencies (Textual)                              
License expiration date                           Feb. 01, 2026  
Straight Path Spectrum [Member] | LMDS 28 GHz range [Member] | Licenses expire on august 10, 2018 [Member]                              
Commitments and Contingencies (Textual)                              
License expiration date                           Aug. 10, 2018  
Licenses to be expired | License                           5  
Straight Path Spectrum [Member] | LMDS 28 GHz range [Member] | Licenses expire on september 21,2018 [Member]                              
Commitments and Contingencies (Textual)                              
License expiration date                           Sep. 21, 2018  
Licenses to be expired | License                           112  
Straight Path Spectrum [Member] | Former Chief Executive Officer [Member]                              
Commitments and Contingencies (Textual)                              
Payments to be made from revenue, percentage                         50.00%    
Amount of maximum future payment for wireless spectrum licenses                         $ 3,250,000    
Amount incurred for obligation                         $ 77,000 $ 48,000 $ 8,000
Straight Path Spectrum'S Spectrum Licenses [Member]                              
Commitments and Contingencies (Textual)                              
Payments of initial civil penalty             $ 15,000,000                
Installment value   $ 3,500,000   $ 4,000,000   $ 4,000,000                  
Number of installments | Installments             4                
Initial civil penalty             $ 15,000,000                
Payments of additional penalty             85,000,000                
Payment of three installments of initial civil penalty             $ 11,500,000                
Straight Path Spectrum'S Spectrum Licenses [Member] | Subsequent Event [Member]                              
Commitments and Contingencies (Textual)                              
Installment value $ 3,500,000