Line of Credit Facility [Abstract] Credit Facilities Short-term Debt [Text Block] Leases [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2016-02 Accounting Standards Update 2016-02 [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Operating lease liability Operating Lease, Liability Sublease income Sublease Income Segment Reporting [Abstract] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] United States UNITED STATES Canada CANADA Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Net sales Revenue from Contract with Customer, Excluding Assessed Tax Fair Value Disclosures [Abstract] Fair Value Measurements Fair Value Disclosures [Text Block] Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Income from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Adjustments to reconcile income from continuing operations to net cash provided by (used in) operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Provision for returns and doubtful accounts Provision for Doubtful Accounts Compensation expense related to equity compensation plans Share-based Compensation Provision for deferred taxes Deferred Income Tax Expense (Benefit) Gain on disposition and abandonment Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Inventories Increase (Decrease) in Inventories Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Income taxes payable Increase (Decrease) in Income Taxes Payable Accounts payable Increase (Decrease) in Accounts Payable Accrued expenses, other current liabilities and other liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Net cash provided by operating activities from continuing operations Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by operating activities from discontinued operations Cash Provided by (Used in) Operating Activities, Discontinued Operations Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of property, plant and equipment Payments to Acquire Property, Plant, and Equipment Net cash used in investing activities from continuing operations Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash used in investing activities from discontinued operations Cash Provided by (Used in) Investing Activities, Discontinued Operations Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Dividends paid Payments of Dividends Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Payment of payroll taxes on stock-based compensation through shares withheld Payments Related to Tax Withholding for Share-based Compensation Proceeds from the issuance of common stock from employee stock purchase plan Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Excluding Stock Options Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Effects of exchange rates on cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Net decrease in cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash – beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash – end of period Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Treasury Stock Treasury Stock [Member] Retained Earnings Retained Earnings [Member] Accumulated Other Comprehensive Income AOCI Attributable to Parent [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning Balance (in shares) Shares, Outstanding Beginning Balance Stockholders' Equity Attributable to Parent Stock-based compensation expense Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Issuance of restricted stock (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Issuance of restricted stock Stock Issued During Period, Value, Restricted Stock Award, Gross Stock withheld for employee taxes (in shares) Shares Paid for Tax Withholding for Share Based Compensation Stock withheld for employee taxes Adjustments Related to Tax Withholding for Share-based Compensation Proceeds from issuance of common stock (in shares) Stock Issued During Period, Shares, Share-based Compensation, Gross Proceeds from issuance of common stock Stock Granted, Value, Share-based Compensation, Gross Issuance of shares under employee stock purchase plan (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Issuance of shares under employee stock purchase plan Stock Issued During Period, Value, Employee Stock Purchase Plan Dividends declared Dividends, Common Stock Change in cumulative translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Net income Net Income (Loss) Attributable to Parent Ending Balance (in shares) Ending Balance Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Accounting Basis of Accounting, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Revenue Revenue from Contract with Customer [Policy Text Block] Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Building Building [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Leased facility size (square feet) Leased Facility, Operating Lease, Size Leased Facility, Operating Lease, Size Lease term (months) Lessee, Operating Lease, Term of Contract Total lease obligation Commitments and Contingencies Disclosure [Abstract] Legal Proceedings Legal Matters and Contingencies [Text Block] Statement of Financial Position [Abstract] ASSETS: Assets [Abstract] Current assets: Assets, Current [Abstract] Cash Cash Accounts receivable, net Accounts Receivable, Net, Current Inventories Inventory, Net Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property, plant and equipment, net Property, Plant and Equipment, Net Deferred income taxes Deferred Income Tax Assets, Net Goodwill and intangibles Intangible Assets, Net (Including Goodwill) Other assets Other Assets, Noncurrent Total assets Assets LIABILITIES AND SHAREHOLDERS’ EQUITY: Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Dividend payable Interest and Dividends Payable, Current Accrued expenses and other current liabilities Accrued Liabilities, Current Operating lease liabilities Operating Lease, Liability, Current Total current liabilities Liabilities, Current Deferred income tax liability Deferred Income Tax Liabilities, Net Other liabilities Other Liabilities, Noncurrent Operating lease liabilities Operating Lease, Liability, Noncurrent Total liabilities Liabilities Commitments and contingencies Commitments and Contingencies Shareholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock Preferred Stock, Value, Issued Common stock Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Treasury stock Treasury Stock, Value Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Total shareholders’ equity Total liabilities and shareholders’ equity Liabilities and Equity Income Statement [Abstract] Cost of sales Cost of Goods and Services Sold Gross profit Gross Profit Selling, distribution & administrative expenses Selling, General and Administrative Expense Operating income from continuing operations Operating Income (Loss) Interest and other (income) expense, net Interest Income (Expense), Net Income from continuing operations before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Provision for income taxes Income Tax Expense (Benefit) Net income from continuing operations Income (loss) from discontinued operations, net of tax Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Net income Net income per common share from continuing operations: Earnings Per Share, Basic and Diluted [Abstract] Basic (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Diluted (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share Net income (loss) per common share from discontinued operations: Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic and Diluted Share [Abstract] Basic (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Diluted (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Net income per common share: Earnings Per Share [Abstract] Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted Weighted average common and common equivalent shares: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Dividends declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Subsequent Event Subsequent Events [Text Block] Revenue from Contract with Customer [Abstract] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Sales Revenue, Net Sales Revenue, Net [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Product Concentration Risk Product Concentration Risk [Member] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Service Revenue Service Revenue [Member] Service Revenue [Member] MRO Products and Industrial Supplies MRO Products Industrial Supplies [Member] MRO Products Industrial Supplies Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Reportable Geographical Components Reportable Geographical Components [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Service revenue, percentage of revenue Concentration Risk, Percentage Performance obligation Revenue, Remaining Performance Obligation, Amount Accrued sales returns Contract with Customer, Refund Liability Revenue from contracts with customers Discontinued Operations and Disposal Groups [Abstract] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] NATG – Non-lease components North American Technology Products Segment [Member] The North American technology products segment provides financial and operational oversight and administrative support for business located in European countries. Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Lease Liabilities and Other Exit Costs Workforce Exit Costs [Member] Termination of an employee associated with exit from or disposal of business activities on workforce exit costs. Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Beginning Balance Restructuring Reserve Charged to expense Restructuring Charges Paid or otherwise settled Restructuring Reserve, Settled without Cash Ending Balance 2019 (excluding three months) Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year 2020 Lessee, Operating Lease, Liability, Payments, Due Year Two 2021 Lessee, Operating Lease, Liability, Payments, Due Year Three 2022 Lessee, Operating Lease, Liability, Payments, Due Year Four 2023 Lessee, Operating Lease, Liability, Payments, Due Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total lease payments Lessee, Operating Lease, Liability, Payments, Due Less: interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Total present value of lease liabilities Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Statement of Comprehensive Income [Abstract] Net income Other comprehensive income: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Foreign currency translation Total comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Components of ROU Asset Lease Expense Lease, Cost [Table Text Block] Maturities of Lease Liabilities Lessee, Operating Lease, Liability, Maturity [Table Text Block] Number of reportable segments Number of Reportable Segments Operating income from continuing operations Segment Information Segment Reporting Disclosure [Text Block] Line of Credit Facility [Table] Line of Credit Facility [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Maximum Maximum [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Number of financial institutions Number Of Financial Institutions Number Of Financial Institutions Revolving credit facility, term Debt Instrument, Term Percentage of eligible accounts receivable for borrowings Percentage of eligible accounts receivable for borrowings The percentage of eligible accounts receivable for borrowings under the agreement. Percentage of inventory advance rate computed Percentage of Inventory Advance Rate Computed Refers to percentage of inventory advance rate computed as the lesser of NOVL (Net Orderly Liquidation Value). Percentage of inventory advance rate of net orderly liquidation value Percentage of Inventory Advance Rate of NOVL Refers to percentage of inventory advance rate computed of NOVL (Net Orderly Liquidation Value). Eligible collateral under the credit facility Eligible collateral under the credit facility Refers to the amount of eligible collateral letters of credit, based on borrowing base availability. Availability under line of credit Line of Credit Facility, Remaining Borrowing Capacity Total outstanding letters of credit Letters of Credit Outstanding, Amount Total excess availability Line of Credit Facility, Current Borrowing Capacity Outstanding borrowings Line of Credit Facility, Fair Value of Amount Outstanding Number of states seeking recovery of unclaimed property Number Of States Seeking Recovery Of Unclaimed Property The number of states being audited and seeking recovery of unclaimed property. Number of states requesting payment Number Of States Requesting Payments Number Of States Requesting Payments Leases Lessee, Operating Leases [Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Employee Stock Option Employee Stock Option [Member] Restricted Stock Restricted Stock [Member] Securities Included and Excluded from the Computation of Earnings Per Share Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Weighted average number of shares included in computation of diluted earnings per share (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Weighted average shares excluded from computation of diluted earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Operating lease cost Operating Lease, Cost Operating leases, weighted average remaining lease term (years) Operating Lease, Weighted Average Remaining Lease Term Operating leases, weighted average discount rate (percent) Operating Lease, Weighted Average Discount Rate, Percent Basis of Presentation Business Description and Basis of Presentation [Text Block] Net sales Disposal Group, Including Discontinued Operation, Revenue Cost of sales Disposal Group, Including Discontinued Operation, Costs of Goods Sold Gross profit Disposal Group, Including Discontinued Operation, Gross Profit (Loss) Selling, distribution & administrative expenses Disposal Group, Including Discontinued Operation, General and Administrative Expense Special charges Disposal Group, Including Discontinued Operation, Special Charges Amount of special charges, net attributable to disposal group, including, but not limited to, discontinued operation. Operating (loss) income from discontinued operations Disposal Group, Including Discontinued Operation, Operating Income (Loss) Interest and other (income) expenses, net Disposal Group, Including Discontinued Operation, Interest and Other Income (Expense) Amount of interest and other income, net loss attributable to disposal group, including, but not limited to, discontinued operation. Income (loss) from discontinued operations before income taxes Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax (Benefit from) provision for income taxes Discontinued Operation, Tax Effect of Discontinued Operation Net income (loss) from discontinued operations Net income (loss) per share – basic (in dollars per share) Net income (loss) per share – diluted (in dollars per share) Net Income per Common Share Earnings Per Share [Text Block] NATG Restatement [Axis] Restatement [Axis] Restatement [Domain] Restatement [Domain] Restatement Adjustment Restatement Adjustment [Member] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Discontinued Operations - Disposed of by Sale Discontinued Operations, Disposed of by Sale [Member] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] SARL Businesses SARL Business Segment [Member] Systemax Europe, which includes its subsidiaries, Systemax Business Services K.F.T., Misco UK Limited, Systemax Italy S.R.L., Misco Iberia Computer Supplies S.L., Misco AB, Global Directmail B.V. and Misco Solutions B.V collectively make the "SARL Businesses. Legal, professional, and other costs Professional Fees Additional charges Additional Charges The amount additional charges charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations. Special charges related to wind-down, legal, professional and other costs Charges Related To Legal, Professional And Other Costs The charge against earnings that represents the legal, professional and other costs from or disposal of business activities or restructurings pursuant to a plan. Restitution receipts Disposal Group, Including Discontinued Operation, Restitution Receipts Disposal Group, Including Discontinued Operation, Restitution Receipts Professional costs related to restitution proceedings Professional Costs Related to Ongoing Restitution Proceedings Amount of professional costs related to ongoing restitution proceedings, net attributable to disposal group, including, but not limited to, discontinued operation. Lease reserve adjustment Disposal Group, Including Discontinued Operation, Lease Reserves Disposal Group, Including Discontinued Operation, Lease Reserves Restructuring reserve Revenue Revenue from Contract with Customer [Text Block] Discontinued Operations and Special Charges (Gains) Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Disposal Group, Disposed of by Sale, Not Discontinued Operations Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] France Business French Business Unit [Member] French Business Unit [Member] Income (loss) from discontinued operations, net of tax Financial Information by Reportable Segment Reconciliation of Revenue from Segments to Consolidated [Table Text Block] Financial Information by Geographic Area Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block] Document and Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Entity Emerging Growth Company Entity Emerging Growth Company Entity Small Business Entity Small Business Reconciliation of Pretax Loss of Discontinued Operations to Loss of Discontinued Operations Disposal Groups, Including Discontinued Operations [Table Text Block] Special Charge Liabilities Schedule of Restructuring Reserve by Type of Cost [Table Text Block]