Concentration Risk Type [Axis] Customer Concentration Risk [Member] Concentration Risk Benchmark [Axis] Accounts Receivable [Member] Finite-Lived Intangible Assets by Major Class [Axis] Customer Lists [Member] Software Development [Member] Sales Revenue [Member] Horizon Software [Member] ZTEsoft Telecom Software [Member] Contractual Relationships [Member] Related Party [Axis] Horizon Latin America [Member] Equity Components [Axis] First Warrant [Member] Sale of Stock [Axis] Private Placement [Member] Class of Stock [Axis] 10% Series A Convertible Preferred Stock [Member] Legal Entity [Axis] One Horizon Group Plc [Member] Mandatorily Redeemable Preferred Shares [Member] Currency [Axis] GBP [Member] Warrant [Member] Plan Name [Axis] 2013 Equity Incentive Plan [Member] Other Stock Options [Member] Geographical [Axis] Rest of Asia [Member] EMEA [Member] China [Member] The Americas [Member] Preferred Stock [Member] Common Stock [Member] Additional Paid-in Capital [Member] Accumulated deficit [Member] Accumulated Other Comprehensive Income (Loss) [Member] Subsequent Event Type [Axis] Subsequent Event [Member] Document And Entity Information Entity Registrant Name Entity Central Index Key Document Type Trading Symbol Document Period End Date Amendment Flag Current Fiscal Year End Date Entity a Well-known Seasoned Issuer Entity a Voluntary Filer Entity's Reporting Status Current Entity Filer Category Entity Public Float Entity Common Stock, Shares Outstanding Document Fiscal Period Focus Document Fiscal Year Focus Statement of Financial Position [Abstract] Assets Current assets: Cash Accounts receivable, net Other assets Total current assets Property and equipment, net Intangible assets, net Investment Total assets Liabilities and Stockholders' Equity Current liabilities: Accounts payable Accrued expenses Accrued compensation Income taxes Convertible debenture, net Total current liabilities Long-term liabilities Amount due to related parties Deferred income taxes Mandatorily redeemable preferred shares Total liabilities Stockholders' Equity Preferred stock: $0.0001 par value, authorized 50,000,000 shares; issued and outstanding 170,940 shares Common stock: $0.0001 par value, authorized 33,333,333 shares; issued and outstanding 6,236,729 shares as of March 31,2017 (December 2016 - 6,144,762) Additional paid-in capital Accumulated deficit Accumulated other comprehensive income (loss) Total stockholders' equity Total liabilities and stockholders' equity Preferred stock: par value (in dollars per share) Preferred stock: authorized Preferred stock: issued Preferred stock: outstanding Common stock: par value (in dollars per share) Common stock: authorized Common stock: issued Common stock: outstanding Income Statement [Abstract] Revenue Cost of revenue - Hardware Cost of revenue - Amortization of intangibles Total cost of revenue Gross margin Expenses: General and administrative Depreciation Research and development Total expenses Loss from operations Other income and expense: Interest expense Foreign exchange Total other income and expense Loss before income taxes Income taxes benefit Net loss for the period Less: Preferred Dividends Net loss attributable to One Horizon Group, Inc. Common stockholders Loss per share attributable to One Horizon Group, Inc. stockholders Basic and diluted net loss per share (in dollars per share) Weighted average number of shares outstanding Basic and diluted (in shares) Net loss Other comprehensive income (loss): Foreign currency translation adjustment gain (loss) Comprehensive loss Comprehensive loss attributable to the non-controlling interest Total comprehensive loss Statement [Table] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance at beginning Balance at beginning (in shares) Net loss Foreign currency translations Shares issued for services Shares issued for services (in shares) Options issued for services Warrants issued for services Balance at ending Balance at ending (in shares) Statement of Cash Flows [Abstract] Cash flows from operating activities: Net loss for the period Adjustment to reconcile net loss for the period to net cash provided by (used in) operating activities: Depreciation of property and equipment Amortization of intangible assets Increase in allowance for doubtful accounts Amortization of debt issue costs Amortization of beneficial conversion feature Amortization of debt discount Amortization of shares issued for services Shares issued for services Warrants issued for services Options issued for services Changes in operating assets and liabilities: Accounts receivable Other assets Accounts payable and accrued expenses Deferred income taxes Net cash provided by (used in) operating activities Cash flows from investing activities: Acquisition of intangible assets Acquisition of property and equipment Net cash (used in) investing activities Cash flows from financing activities: (Decrease) in long-term borrowing, net Dividends paid Net cash used in financing activities Increase (Decrease) in cash during the period Foreign exchange effect on cash Cash at beginning of the period Cash at end of the period Organization, Consolidation and Presentation of Financial Statements [Abstract] Description of Business, Organization and Principles of Consolidation Accounting Policies [Abstract] Summary of Significant Accounting Policies Goodwill and Intangible Assets Disclosure [Abstract] Intangible Assets Related Party Transactions [Abstract] Related-Party Transactions Stockholders' Equity Note [Abstract] Share Capital Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Stock-Based Compensation Segment Reporting [Abstract] Segment Information Subsequent Events [Abstract] Subsequent Event Liquidity and Capital Resources Foreign Currency Translation Accounts Receivable Intangible Assets Revenue Recognition Research and Development Expenses Debt Issue Costs Income Taxes Net Loss per Share Accumulated Other Comprehensive Income (Loss) Use of Estimates Share-Based Compensation Schedule of intangible assets Schedule of stock purchase warrants Schedule of black-scholes option valuation model for warrant issued Schedule of equity incentive plan Schedule of other stock options Schedule of revenues by geographic areas Number of customers Percentage of concentration risk Useful life of intangible assets Revenue Capitalized cost for software development Intangible assets, gross Less accumulated amortization Due from related party Maturity date Initial payments received upon perpetual software license Percentage ownership interest Number of Warrants Weighted average exercise price (in dollars per share) Expiry Intrinsic value Share Capital Details 1 Common stock fair value Risk-free interest rate Expected dividend yield Expected warrant life (years) Expected stock price volatility Preferred stock, authorized Preferred stock, par value (in dollars per share) Preferred stock, issued Preferred stock, outstanding Temporary equity issued Temporary equity par value (in pound per share) Common stock, authorized Common stock, par value (in dollars per share) Number of shares issued for services Fair value issued for services Number of common shares reserved for outstanding warrants Number of shares issued upon new issue Number of warrants forfeited Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Outstanding at beginning Options issued Outstanding at ending Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] Outstanding at beginning Options issued Outstanding at ending Unrecognized compensation expense Number of common stock reserved for future issuance Revenues Number of segments Description of reverse stock split Share price (in dollars per share) Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation for other long-term incentive plan. Represent the information about the amortization of beneficial conversion feature. Amount of noncash expense included in interest expense to amortization issued for services. Date the warrants or rights are exercisable, in CCYY-MM-DD format. Number of warrants forfeited. Amount by which the current fair value of the underlying stock exceeds the exercise price of fully outstanding. Represent the information about the contractual relationships. Information by plan name pertaining to equity-based compensation arrangements. Represent the information about the hardware Cost. Represent the information about the software. Represent the information about the issuance of stock option for services. Represent the information about the number of customers. Represent the information about the other stock options. Information by geographical components. Value of stock issued in lieu of cash for services contributed to the entity. Value of the stock issued includes, but is not limited to, services contributed by vendors and founders. Value of stock issued in lieu of cash for services contributed to the entity. Value of the stock issued includes, but is not limited to, services contributed by vendors and founders. Entity owned or controlled by another entity. Security that gives the holder the right to purchase shares of stock in accordance with the terms of the instrument, usually upon payment of a specified amount. Represent the information about the software development. Price of a single share of a number of saleable stocks of a company. Assets, Current Assets [Default Label] Liabilities, Current Liabilities Stockholders' Equity Attributable to Parent Liabilities and Equity Cost of Goods and Services Sold Gross Profit Operating Expenses Operating Income (Loss) Interest Expense Nonoperating Income (Expense) Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income Tax Expense (Benefit) Preferred Stock Dividends, Income Statement Impact Net Income (Loss) Available to Common Stockholders, Basic Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Shares, Outstanding StockIssuedDuringPeriodValueIssuedForServices3 IssuanceOfStockOptionForServices Increase (Decrease) in Accounts Receivable Increase (Decrease) in Other Operating Assets Increase (Decrease) in Deferred Income Taxes Net Cash Provided by (Used in) Operating Activities, Continuing Operations Payments to Acquire Intangible Assets Payments to Acquire Property, Plant, and Equipment Net Cash Provided by (Used in) Investing Activities, Continuing Operations Payments of Ordinary Dividends, Preferred Stock and Preference Stock Net Cash Provided by (Used in) Financing Activities, Continuing Operations Cash and Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Intangible Assets, Finite-Lived, Policy [Policy Text Block] Sales Revenue, Goods, Net Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price