Document and Entity Information [Abstract] Statement [Table] Class of Stock [Axis] Class of Stock [Domain] Common Class A [Member] Common Class A [Member] Class A Common Stock Common Class B [Member] Common Class B [Member] Class B Common Stock Class B Common Stock [Member] Class B common stock [Member] Statement [Line Items] Entity Registrant Name Entity Central Index Key Amendment Flag Current Fiscal Year End Date Document Type Trading Symbol Document Period End Date Document Fiscal Period Focus Document Fiscal Year Focus Entity Filer Category Entity Common Stock, Shares Outstanding Balance Sheets [Abstract] Scenario [Axis] Scenario, Unspecified [Domain] Pro forma [Member] Pro forma Assets [Abstract] Assets Assets, Current [Abstract] Current assets: Cash and cash equivalents at beginning of period Cash and cash equivalents Cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash and cash equivalents Accounts Receivable, Net, Current Trade accounts receivable, net Trade accounts receivable, net of allowance for doubtful accounts of $7 and $0, respectively Inventory Inventory Assets Held For Sale Intellectual Property Business Assets held for sale - Intellectual Property Business Assets held for sale intellectual property business. Prepaid Expense, Current Prepaid expenses and other current assets Prepaid expenses and other current assets Assets, Current Total current assets Prepaid Expenses Related To Sale Of Spectrum Business To Verizon Prepaid expenses - related to the sale of Spectrum Business to Verizon Prepaid expenses related to the sale of spectrum business to verizon. Prepaid Expenses Related To Sale Of Ip Business To Idt Prepaid expenses - related to the sale of IP Business to IDT Prepaid expenses related to the sale of ip business to idt. Intangible Assets, Net (Excluding Goodwill) Intangible assets Intangible assets Other Assets, Noncurrent Other assets Other assets Assets Total assets: Total Assets Liabilities And Stockholders Equity Abstract Liabilities and Equity (Deficiency) Liabilities, Current [Abstract] Current liabilities: Current liabilities: Accounts Payable, Trade, Current Trade accounts payable Trade accounts payable (related party of $43 and $0) Trade accounts payable Accrued Liabilities, Current Prepaid expenses Accrued expenses TOTAL Accrued expenses Liabilities Held For Sale Intellectual Property Business Liabilities held for sale - Intellectual Property Business Liabilities held for sale intellectual property business. Loans Payable Borrowed from investors Loans payable, net of debt discount of $2,119 and $0, respectively FCC consent decree payable FCC consent decree payable Amount of liabilities Fcc consent decree payable. Deferred Revenue, Current Deferred revenue Deferred revenue Taxes Payable, Current Income taxes payable Income taxes payable Liabilities, Current Total current liabilities Settlement payable - stockholders Deferred Revenue, Noncurrent Deferred revenue - long-term portion Deferred revenue - long-term portion Liabilities Total liabilities Total liabilities Commitments and Contingencies Commitments and contingencies Equity [Abstract] Equity (Deficiency) Stockholders' Equity Attributable to Parent [Abstract] Straight Path Communications Inc. stockholders' equity: Straight Path Communications Inc. stockholders' equity: Straight Path Communications Inc. stockholders' equity: Preferred Stock, Value, Issued Preferred stock Preferred stock, $0.01 par value; 3,000 shares authorized; no shares issued and outstanding Common Stock, Value, Issued Common stock value Common stock, value Additional Paid in Capital Additional paid-in capital Additional paid-in capital Retained Earnings (Accumulated Deficit) Accumulated deficit Accumulated deficit Accumulated deficit Treasury Stock, Value Treasury stock, value Number of shares held in treasury stock, value Treasury stock Treasury stock, 40 shares at cost Stockholders' Equity Attributable to Parent Total Straight Path Communications Inc. stockholders' equity (deficiency) Stockholders' Equity Attributable to Noncontrolling Interest Noncontrolling interests Noncontrolling interests Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total equity (deficiency) Balance Balance Liabilities and Equity Liabilities and equity Total liabilities and equity (deficiency) Beginning balance Ending Balance Equity Components [Axis] Equity Component [Domain] Common Stock Common Stock [Member] Common Stock Common Stock To Be Issued [Member] To Be Issued Common stock to be issued Represent information of common stock to be issued. Allowance for Doubtful Accounts Receivable Net of allowance for doubtful accounts Allowance for doubtful accounts, Balance at beginning of year Allowance for doubtful accounts, Balance at end of year Debt Instrument, Unamortized Discount, Current Loans payable, net of debt discount Preferred Stock, Par or Stated Value Per Share Preferred stock, par value Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Issued Preferred stock, shares issued Preferred Stock, Shares Outstanding Preferred stock, shares outstanding Common Stock, Par or Stated Value Per Share Common stock, par value Common stock, par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock shares distributed Common stock, shares issued Common Stock, Shares, Outstanding Common stock, shares outstanding Common stock, shares outstanding Balance (in shares) Balance (in shares) Treasury Stock, Shares Treasury stock, shares Statements of Operations [Abstract] Revenues Revenues Revenues Revenues Costs and Expenses [Abstract] Costs and expenses: Cost of Revenue Direct cost of revenues Research and Development Expense Research and development Research and development expenses Selling, General and Administrative Expense Included in Selling, general and administrative expenses Selling, general and administrative (related party of $2, $0, $207, and $0) Costs and Expenses Total costs and expenses Loss From Operations Before Item Listed Below Loss from operations before item listed below Loss from operations before item listed below Loss from operations before item listed below Loss from operations before item listed below Loss from operations before item listed below Civil Penalty Fcc Decree Civil penalty - Fcc decree A civil penalty or civil fine is a financial penalty imposed by a government agency as restitution for wrongdoing. Civil penalty - FCC consent decree Stockholder Settlement Stockholder settlement The Parties have reached an agreement to settle the shareholder. Stockholder settlement Operating Income (Loss) Loss from operations before FCC Decree and stockholder settlement Income (loss) from operations Loss from operations before FCC Consent Decree and stockholder settlement Loss from operations Loss from operations Other Nonoperating Income (Expense) [Abstract] Other income (expense): Amortization of Debt Issuance Costs Interest expense, including amortization of debt discounts Interest expense, including amortization of debt discounts Interest Income, Other Interest income Other Income Other income Other Nonoperating Income (Expense) Total other income (expense) Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income (loss) before income taxes Loss before income tax benefits (income taxes) Income Tax Expense (Benefit) Provision for income taxes PROVISION FOR INCOME TAXES Provision for income tax benefits (income taxes) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net loss Net loss Net loss Income (Loss) Attributable to Noncontrolling Interest Net loss attributable to noncontrolling interests Net loss attributable to noncontrolling interests Net Income (Loss) Attributable to Parent Net loss Net (loss) income Net loss attributable to Straight Path Communications Inc. Earnings (loss) per share attributable to Straight Path Communications Inc. stockholders: Loss per share attributable to Straight Path Communications Inc. stockholders: Earnings Per Share, Basic and Diluted Basic and diluted Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted-average number of shares used in calculation of loss per share: Weighted Average Number of Shares Outstanding, Basic and Diluted Basic and diluted Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party Selling, general and administrative related party Statement of Stockholders' Equity [Abstract] Additional Paid-in Capital [Member] Additional Paid-In Capital Retained Earnings [Member] Accumulated Deficit Treasury Stock [Member] Treasury Stock Noncontrolling Interest [Member] Noncontrolling Interests Shares, Outstanding Common stock, shares outstanding Common stock, Shares outstanding Balance, shares Balance, shares Stock Issued During Period, Value, Stock Options Exercised Common stock issued for exercises of stock options Common stock issued for exercises of stock options Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Common stock issued for exercises of stock options, Shares Stock options Common stock issued for exercises of stock options, shares Stock Issued During Period Issuance Of Warrants With Loans Payable Issuance of warrants with loans payable Issuance of warrants with loans payable. Stock Issued During Period Issuance Of Warrants With Loans Payable Shares Issuance of warrants with loans payable, shares Issuance of warrants with loans payable shares. Stock Issued During Period Common Stock Issued For Exercises Of Warrants Common stock issued for exercises of warrants Common stock issued for exercises of warrants. Stock Issued During Period Common Stock Issued For Exercises Of Warrants Shares Common stock issued for exercises of warrants, shares Common stock issued for exercises of warrants shares. Stock Issued During Period, Value, Share-based Compensation, Gross Common stock issued for compensation Common stock issued for compensation Common stock issued or to be issued for compensation Stock Issued During Period, Shares, Share-based Compensation, Gross Common stock issued for compensation, shares Stock issued during period as compensation, Shares Stock issued during period as compensation Stock issued during period as compensation, Shares Stock Issued During Period, Value, Share-based Compensation, Forfeited Stock-based compensation is included in selling, general and administrative Stock-based compensation Statement of Cash Flows [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash used in operating activities: Allocated Share-based Compensation Expense Common stock issued for compensation Share-based Compensation Common stock issued for compensation Stock-based compensation Stock-based compensation is included in selling, general and administrative Common stock issued or to be issued for compensation Amortization of debt discounts Loans payable, net of debt discount Amortization of debt discounts Provision for Doubtful Accounts Allowance for doubtful accounts Depreciation Depreciation Increase (Decrease) in Operating Capital [Abstract] Changes in assets and liabilities: Increase (Decrease) in Accounts Receivable Trade accounts receivable, net Trade accounts receivable, net Increase Decrease In Due From Settlement Due from settlement Increase decrease in due from settlement. Increase (Decrease) in Inventories Inventory Inventory Increase Decrease In Assets Held For Sale Intellectual Property Business Assets held for sale - Intellectual Property Business Increase decrease in assets held for sale intellectual property business. Increase (Decrease) in Prepaid Expense Prepaid expenses - settlements Prepaid expenses - related to IP settlements and licensing Increase (Decrease) in Prepaid Expenses, Other Prepaid expenses and other current assets Increase Decrease In Prepaid Expenses Development Agreement Prepaid expenses - development agreement Prepaid expenses - development agreement Represent amount of Prepaid expenses development agreement. Prepaid expenses - development agreement Increase (Decrease) in Other Operating Assets, Total Other assets Other assets Increase (Decrease) in Accounts Payable, Trade Trade accounts payable Increase (Decrease) in Accrued Liabilities Accrued expenses Increase Decrease Fcc Consent Decree Payable FCC consent decree payable The increase (decrease) in obligations consent decree payable. Increase Decrease In Liabilities Held For Sale Intellectual Property Business Liabilities held for sale - Intellectual Property Business Increase decrease in liabilities held for sale intellectual property business. Increase (Decrease) in Deferred Revenue Deferred revenue Increase (Decrease) in Income Taxes Payable Income taxes payable Income taxes payable Increase (Decrease) in Due to Officers and Stockholders Settlement payable - stockholders Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash used in operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Investing activities: Payments Of Prepaid Expenses Related To Sale Of Spectrum Business To Verizon Prepaid expenses - related to sale of Spectrum business to Verizon Payments of prepaid expenses related to sale of spectrum business to verizon. Payments Of Prepaid Expenses Related To Sale Of Ip Business To Idt Prepaid expenses - related to sale of IP business to IDT Payments of prepaid expenses related to sale of IP business to IDT. Prepaid expenses - related to sale of IP business to IDT Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Purchases of property and equipment Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Financing activities: Proceeds from Loans Proceeds from loans payable Costs Related To Loans Payable Costs related to loans payable Costs related to loans payable. Proceeds from Stock Options Exercised Common stock issued upon exercise of stock options Net Cash Provided by (Used in) Financing Activities Net cash provided by financing activities Net cash provided by financing activities Cash and Cash Equivalents, Period Increase (Decrease) Net increase (decrease) in cash and cash equivalents Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Supplemental schedule of noncash activities Noncash Reclassification Of Prepaid Marketing To Inventory Reclassification of prepaid marketing to inventory The amount of non cash reclassification of prepaid marketing to inventory. Exercises Of Warrants Reducing Loans Payable Exercises of warrants reducing loans payable Exercises of warrants reducing loans payable. Supplemental cash flow information [Abstract] Supplemental cash flow information Interest Paid, Net Cash paid during the period for interest Income Taxes Paid, Net Cash paid during the period for income taxes Purchase of intangibles Cash paid during the period for income taxes Basis of Presentation [Abstract] Basis of Accounting [Text Block] Basis of Presentation Basis of Presentation Verizon Merger Agreement [Abstract] Verizon Merger Agreement Verizon Merger Agreement [Text Block] Verizon Merger Agreement The entire disclosure Verizon Merger Agreement. Settlement of Claims with IDT and Sale of Straight Path IP Group [Abstract] Settlement Of Claims With Idt And Sale Of Straight Path Ip Group [Text Block] Settlement of Claims with IDT and Sale of Straight Path IP Group Settlement of claims with Idt and sale of straight path Ip group. Summary of Significant Accounting Policies and Recent Pronouncements [Abstract] Basis of Presentation [Abstract] Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies and Recent Pronouncements Fair Value Measures [Abstract] Fair Value Disclosures [Text Block] Fair Value Measures Inventory [Abstract] Inventory Disclosure [Text Block] Inventory Loan Payable [Abstract] Debt Disclosure [Text Block] Loan Payable Stockholders' Equity Note Disclosure [Text Block] Equity Stock-Based Compensation [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation Earnings (Loss) Per Share [Abstract] (Loss) earnings per share attributable to Straight Path Communications Inc. stockholders: Earnings Per Share [Text Block] Earnings (Loss) Per Share Related Party Transactions [Abstract] Related Party Transactions [Abstract] Related Party Transactions Disclosure [Text Block] Related Party Transactions Income Taxes [Abstract] Income Tax Disclosure [Text Block] Income Taxes Business Segment Information [Abstract] Business Segment Information Segment Reporting Disclosure [Text Block] Business Segment Information Commitments and Contingencies [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies New Accounting Pronouncements, Policy [Policy Text Block] Summary of Significant Accounting Policies and Recent Pronouncements Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Summary of shares excluded from diluted earnings per share computations Schedule of Segment Reporting Information, by Segment [Table Text Block] Summary of operating results for the business segments Reconciliation of Assets from Segment to Consolidated [Table Text Block] Summary of total assets for the business segments Schedule of Subsidiary of Limited Liability Company or Limited Partnership [Table] Legal Entity [Axis] Entity [Domain] Subsidiaries [Member] Straight Path Spectrum [Member] Straight Path [Member] Subsidiaries [Member] Subsidiaries One Member Straight Path IP Group [Member] Straight Path IP Group [Member] Subsidiaries One. Subsidiary of Limited Liability Company or Limited Partnership [Line Items] Basis of Presentation (Textual) Basis Of Presentation Textual [Abstract] Basis of Presentation (Textual) Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions Ownership in straight path spectrum Initial Penalty Payment Initial penalty payment Initial penalty payment. Litigation Settlement, Expense Settlement of initial payment Additional Settlement Payment Additional settlement payment Additional settlement payment. Verizon Merger Agreement [Table] Related Party Transaction [Axis] Related Party Transaction [Domain] Ptpms Communications Llc [Member] PTPMS [Member] Title of Individual [Axis] Relationship to Entity [Domain] Former Chief Executive Officer Of Straight Path Spectrum [Member] Former SPSI CEO [Member] Related Party [Axis] Related Party [Domain] Jonathan Rand [Member] Rand [Member] Zhouyue Pi And David Breau [Member] Breau [Member] Davidi Jonas [Member] Jonas [Member] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Verizon Merger Agreement [Line Items] Verizon Merger Agreement Textual [Abstract] Verizon Merger Agreement (Textual) Stock Issued During Period, Value, New Issues Nonassessable shares of common stock, value Merger Agreement Termination Fees Termination fee The amount of termination fees in merger agreement during the reporing period. Parent Termination Fee Parent termination fee It represent parent termination fee for the reporting period. Payments for Merger Related Costs Incurred costs in merger agreement Merger Consideration Description Merger consideration, description Merger consideration description. Payments To Future Revenue From Spectrum Percentage Payment to consent decree, percentage Payments From Future Revenue From Spectrum Percentage Payments to future revenues from spectrum, Percentage. Related Party Transaction, Due from (to) Related Party, Current Former SPSI CEO (Member) Balance owed of straight path spectrum Financial Advisor And Legal Fees Financial advisor and legal fees Financial advisor and legal fees. Retention Bonus Payment Retention bonus payment Retention bonus payment. Repayments of Related Party Debt Payment of IDT Equity Method Investment, Ownership Percentage Percentage of net proceeds received by shareholders Total Incurred Cost Of Negotiation And Execution Of Term Sheet Total incurred cost of negotiation and execution of term sheet Total incurred cost of negotiation and execution of term sheet. Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Loan Agreement [Member] Loan Agreement [Member] Loan agreement member. Debt Instrument [Line Items] Debt Instrument, Interest Rate, Effective Percentage Interest rate Debt Instrument, Interest Rate, Increase (Decrease) Interest rate, Increase (Decrease) Debt Instrument, Maturity Date Loan maturity date Payments Of Initial Civil Penalty Payments of initial civil penalty Payments of initial civil penalty Payments of initial civil penalty. Payments of initial civil penalty Payments Of First Instalment Payments of first installment Payments of first instalment. Warrants Issued To Purchase Of Common Stock Warrant issued to purchase common stock Warrants issued to purchase of common stock. Class of Warrant or Right, Exercise Price of Warrants or Rights Warrants exercise price Investment Warrants Expiration Date Warrants expire date Proceeds from Warrant Exercises Proceeds from aggregate warrants Percentage Of Warrant Description Percentage of warrant description Percentage of warrant description. Fair Value Adjustment of Warrants Fair value of warrants Fair Value Assumptions, Risk Free Interest Rate Risk-free rate Fair Value Assumptions, Expected Dividend Rate Dividend yield Fair Value Assumptions, Expected Volatility Rate Volatility Fair Value Assumptions, Expected Term Expected term Payments of Loan Costs Paid in cash for loan Interest Expense, Debt, Excluding Amortization Amortization amount Interest Expense, Debt Interest expense, debt Other Loans Payable Loans payable Debt Instrument, Unamortized Discount Unamortized debt discounts Schedule of Stock by Class [Table] Officer [Member] Other officers [Member] Employee [Member] Other employees [Member] Represents employee. Chief Executive Officer [Member] Jonas [Member] Consultant [Member] Consultant [Member] Director [Member] Directors [Member] Treasury Stock, Common [Member] Treasury Stock, Common [Member] Option Indexed to Issuer's Equity [Axis] Option Indexed to Issuer's Equity, Type [Domain] Stock options [Member] Stock options [Member] Shares underlying stock options [Member] Warrant [Member] Warrant [Member] Warrants [Member] Class of Stock [Line Items] Equity (Textual) Equity Textual [Abstract] Equity (Textual) Stock Issued During Period Shares Warrants Exercised Common stock issued for exercises of warrants, shares Number of share warrants (or share units) exercised during the current period. Stock Issued During Period Value Warrants Exercised Common stock issued for exercises of stock options, value Value of stock issued as a result of the exercise of warrants. Issuances Of Warrants To Purchase Issuances of warrants to purchase Issuances of warrants to purchase. Class of Warrant or Right, Outstanding Warrants outstanding Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Option Indexed to Issuer's Equity, Type [Axis] Officers And Employees [Member] Officers and Employees [Member] Officers and employees. Jonas [Member] Jonas [Member] Range [Axis] Range [Domain] Minimum [Member] Minimum [Member] Maximum Maximum [Member] Vesting [Axis] Vesting [Domain] Vested One [Member] Vested one [Member] Vested One [Member]. Vested Two [Member] Vested two [Member] Vested Two [Member]. Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stock Based Compensation Textual [Abstract] Stock-Based Compensation (Textual) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Class B common stock reserved for grant of awards under 2013 Plan Stock Issued During Period, Shares, Restricted Stock Award, Gross Granted restricted shares of Class B common stock Stock Issued During Period, Value, Restricted Stock Award, Gross Fair value of granted restricted shares of Class B common stock Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Vesting period Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Unrecognized compensation cost related to non-vested restricted shares Expected To Recognize Unrecognized Compensation Cost Next Fiscal Year Unrecognized compensation cost 2017 Represents expected amount to recognize the unrecognized compensation cost for next fiscal year. Expected To Recognize Unrecognized Compensation Cost Fiscal Year Two Unrecognized compensation cost 2018 Represents expected amount to recognize the unrecognized compensation cost for fiscal year two. Expected To Recognize Unrecognized Compensation Cost Fiscal Year Three Unrecognized compensation cost 2019 Represents expected amount to recognize the unrecognized compensation cost for fiscal year three. Expected To Recognize Unrecognized Compensation Cost Fiscal Year Four Unrecognized compensation cost 2020 Represents expected amount to recognize the unrecognized compensation cost for fiscal year four. Expected To Recognize Unrecognized Compensation Cost Fiscal Year Five Unrecognized compensation cost 2021 Represents expected amount to recognize the unrecognized compensation cost for fiscal year five. Number Of Directors Number of directors Represents the number of directors. Non Vested Restricted Class B Common Stock [Member] Non-vested restricted Class B common stock [Member] Earnings Per Share, Diluted, Other Disclosures [Abstract] Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Stock options Shares excluded from the calculation of diluted (loss) earnings per share Related Party Transactions Textual [Abstract] Related party transactions (Textual) Related party transactions. Legal Fees Legal fees Finite-lived Intangible Assets Acquired Law firm owned Schedule of Segment Reporting Information, by Segment [Table] Subsidiaries Two [Member] Straight Path Ventures [Member] Subsidiaries two. Segment Reporting Information [Line Items] Segment Reporting Information, Profit (Loss) [Abstract] Summary of operating results for the business segments Segment Reporting Information, Additional Information [Abstract] Summary of total assets for the business segments Business Segment Information Textual [Abstract] Business Segment Information (Textual) Number of Reportable Segments Reportable Segments Percentage Of General And Administrative Expenses Percentage of general and administrative expenses The percentage of general and administrative expenses. Percentage Of Employment Expenses Employment expenses of Chief Technology Officer Employee expenses related to several other employees The percentage of employment expenses. Percentage Of Employee Expenses Employment expenses related to one employee The percentage of employee expenses. Percentage Of Employee Expense Employee expenses related to several other employees Percentage of employee expenses Product Liability Contingency [Table] Straight Path Spectrum Spectrum Licenses [Member] Straight Path Spectrum'S Spectrum Licenses [Member] Straight Path Spectrums spectrum licenses. Former Chief Executive Officer [Member] Former Chief Executive Officer [Member] Former Chief Executive Officer [Member] Merger Agreement [Axis] Merger Agreement [Domain] Verizon Merger Agreement [Member] Verizon Merger Agreement [Member] Product Liability Contingency [Line Items] Commitments and Contingencies (Textual) Commitments And Contingencies Textual [Abstract] Commitments and Contingencies (Textual) Installment Value Installment value Installment value. Number Of Instalments Number of installments Number of instalments. Initial Civil Penalty Initial civil penalty Initial civil penalty. Payments Of Additional Penalty Payments of additional penalty Payments of additional penalty. Payment Of Two Installments Of Initial Civil Penalty Payment of two installments of initial civil penalty Payment two installments of initial civil penalty. Consent Decree Payable FCC Consent decree payable Consent decree payable. Payment Of Penalty Payment of penalty Payment of penalty. Debt Instrument, Fee Amount Additional payment Loan From Lenders Loan from lenders Loan from Lenders. Loss Contingency, Settlement Agreement, Terms Description of legal settlement agreement Amount Recovered From Patent Infringers Paid To Law Firm Terms Settlement of litigation, description Settlement of litigation, description Amount recovered from patent infringers paid to law firms terms. Percentage Of Amount Recovered From Patent Infringers Paid To Law Firm Recoverable contingency patents allegedly infringed, percentage Recoverable contingency patents allegedly infringed, percentage Percentage of amount recovered from patent infringers paid to law firms. Maximum Future Payment For Wireless Spectrum Licenses Amount of maximum future payment for wireless spectrum licenses Amount of maximum future payment for wireless spectrum licenses Maximum future payment for wireless spectrum licenses. Cumulative Amount Paid For Payment From Future Revenues From Spectrum Obligation Amount incurred for obligation Cumulative amount paid for payment from future revenues from spectrum obligation. Payments From Future Revenue From Spectrum Percentage Payments to be made from revenue, percentage Payments from future revenues from spectrum, Percentage. Percentage Of Profit Share Percentage of profit share Percentage price of original principal amount of license agreement with PTPM can be issued by the net proceeds from any partition, sales, assignment, etc.,