Earnings Per Share [Abstract] Components of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Investments, Debt and Equity Securities [Abstract] Investments in Marketable Securities Marketable Securities [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table] Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Eligible Item or Group for Fair Value Option [Axis] Eligible Item or Group for Fair Value Option [Axis] Fair Value, Option, Eligible Item or Group [Domain] Fair Value, Option, Eligible Item or Group [Domain] Cash equivalents Cash Equivalents [Member] Marketable securities Marketable securities [Member] Marketable securities [Member] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Money market securities Money Market Instruments [Member] Money Market Instruments [Member] Commercial paper Commercial Paper [Member] Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Marketable securities Available-for-sale Securities Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Accounting Policies [Abstract] Basis of Accounting Basis of Accounting, Policy [Policy Text Block] Fiscal Periods Fiscal Period, Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] New Accounting Standard New Accounting Pronouncements, Policy [Policy Text Block] Non-cash impairment charges Impairment of Long-Lived Assets Held-for-use Organization, Consolidation and Presentation of Financial Statements [Abstract] Number of stores Number of Stores Number of states Number Of States Number Of States Summary of Significant Accounting Policies and New Accounting Standard Significant Accounting Policies [Text Block] Commitment And Contingencies [Table] Commitment And Contingencies [Table] Commitment And Contingencies [Table] Litigation Case [Axis] Litigation Case [Axis] Litigation Case [Domain] Litigation Case [Domain] Kirstin Christiansen, Shellie Smith and Paul Haug, on behalf of themselves and all others similarly situated vs. World of Jeans & Tops Case One [Member] Case One [Member] Maria Rebolledo, individually and on behalf of all others similarly situated and on behalf of the general public vs. Tilly's, Inc.; World of Jeans & Tops Case Two [Member] Case Two [Member] Karina Whitten, on behalf of herself and all others similarly situated, v. Tilly's Inc. Case Three [Member] Case Three [Member] Skylar Ward, on behalf of herself and all other similarly situated, v. Tilly's Inc. Case Four [Member] Case Four [Member] Commitment And Contingencies [Line Items] Commitment And Contingencies [Line Items] Commitment And Contingencies [Line Items] Established loss provisions Loss Contingency Accrual Plaintiff filed putative class action lawsuit Loss Contingency, New Claims Filed, Number Litigation settlement Litigation Settlement, Amount Litigation settlement term Loss Contingency, Settlement Agreement, Terms Estimated minimum reasonably possible loss Loss Contingency, Range of Possible Loss, Minimum Estimated maximum reasonably possible loss Loss Contingency, Range of Possible Loss, Maximum Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Table] Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Table] Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Class A and Class B common stock Common Class A and Class B [Member] Common Class A and Class B [Member] Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items] Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items] Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items] Net income Net Income (Loss) Attributable to Parent Weighted average basic shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Dilutive effect of stock options and restricted stock (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Weighted average shares for diluted earnings per share (in shares) Weighted Average Number of Shares Outstanding, Diluted Basic earnings per share of Class A and Class B common stock (in dollars per share) Earnings Per Share, Basic Diluted earnings per share of Class A and Class B common stock (in dollars per share) Earnings Per Share, Diluted Description of the Company and Basis of Presentation Business Description and Basis of Presentation [Text Block] Stock options and restricted stock excluded from the calculation of diluted earning per share Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of goods sold Cost of Sales [Member] Selling, general and administrative expenses Selling, General and Administrative Expenses [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stock-based compensation Share-based Compensation Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common stock (Class A) Common Class A [Member] Common stock (Class B) Common Class B [Member] Statement [Line Items] Statement [Line Items] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Marketable securities Marketable Securities, Current Receivables Receivables, Net, Current Merchandise inventories Inventory, Net Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment, net Property, Plant and Equipment, Net Other assets Other Assets, Noncurrent Total assets Assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued expenses Accrued Liabilities, Current Deferred revenue Deferred Revenue, Current Accrued compensation and benefits Employee-related Liabilities, Current Current portion of deferred rent Deferred Rent Credit, Current Current portion of capital lease obligation Capital Lease Obligations, Current Total current liabilities Liabilities, Current Long-term portion of deferred rent Deferred Rent Credit, Noncurrent Long-term portion of capital lease obligation Capital Lease Obligations, Noncurrent Total long-term liabilities Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 5) Commitments and Contingencies Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Common stock Common Stock, Value, Issued Preferred stock, $0.001 par value; October 31, 2015 and January 31, 2015 - 10,000 shares authorized, no shares issued or outstanding Preferred Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Total stockholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders’ equity Liabilities and Equity Schedule Of Financial Instruments And Marketable Securities [Table] Schedule Of Financial Instruments And Marketable Securities [Table] Schedule Of Financial Instruments And Marketable Securities [Table] Financial Instruments And Marketable Securities [Line Items] Financial Instruments And Marketable Securities [Line Items] Financial Instruments And Marketable Securities [Line Items] Cost Available-for-sale Securities, Debt Securities Gross Unrealized Holding Gains Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Holding Losses Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax Fair Value Available-for-sale Debt Securities, Amortized Cost Basis Effective tax rate Effective Income Tax Rate Reconciliation, Percent Related Party Transactions [Abstract] Related Party Transactions Related Party Transactions Disclosure [Text Block] Class A common stock Stock Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Beginning balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Expired Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Ending balance Vested and expected to vest ending balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Exercisable ending balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Grant Date Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Beginning balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Expired (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Ending balance (in dollars per share) Vested and expected to vest ending balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Exercisable ending balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted Average Remaining Contractual Life (in Years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Outstanding at end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Vested and expected to vest end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Exercisable ending balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value [Abstract] Outstanding at end of period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Vested and expected to vest ending balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Exercisable ending balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Market value per share (in dollars per share) Share Price Expected option term Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Weighted average expected volatility factor Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Weighted average risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected annual dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Gains on sales and maturities of marketable securities Gain (Loss) on Investments Debt Disclosure [Abstract] Line of Credit Facility [Table] Line of Credit Facility [Table] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR London Interbank Offered Rate (LIBOR) [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Stand-by and/or commercial letters of credit Standby Letters of Credit [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Maximum Maximum [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Letters of credit facility maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Line of credit maturity date Line of Credit Facility, Expiration Date Line of credit interest rate term Debt Instrument, Interest Rate Terms Line of credit, percentage point added to reference rate Debt Instrument, Basis Spread on Variable Rate Covenant description Debt Instrument, Covenant Description Net loss after taxes (not to exceed) Impairment of goodwill, other intangibles and store assets (up to) Goodwill, Impairment Loss Balance sheet leverage Leverage Ratio On Credit Facility Leverage Ratio On Credit Facility Covenant compliance Line of Credit Facility, Covenant Compliance Outstanding borrowing Long-term Line of Credit Earnings Per Share Earnings Per Share [Text Block] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Nonvested Non Vested [Member] Non Vested [Member] Restricted Stock Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Beginning balance Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Ending balance Weighted Average Grant-Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Beginning balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Ending balance (in dollars per share) Statement of Comprehensive Income [Abstract] Other comprehensive (loss) income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Net change in unrealized gain on available-for-sale securities, net of tax Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Found approved for support TLC Related Party Transaction, Amounts of Transaction Statement of Stockholders' Equity [Abstract] Common Stock (Class A) Common Stock (Class B) Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Retained Earnings Retained Earnings [Member] Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Loss) [Member] Beginning balance (in shares) Shares, Outstanding Beginning balance Restricted stock (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Taxes paid in lieu of shares issued Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation Shares converted by founders (in shares) Conversion of Class B common stock to Class A common stock, Shares Conversion of Class B common stock to Class A common stock, Shares Stock-based compensation expense Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Exercise of stock options (in shares) Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Change in unrealized loss on available-for-sale securities Ending balance (in shares) Ending balance Stock Option Activity Under Stock Option Plan Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Assumptions Used to Estimate Fair Value of Stock Options Granted Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Summary of Status of Non-Vested Restricted Stock Nonvested Restricted Stock Shares Activity [Table Text Block] Schedule of Stock Based Compensation Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2012 Plan Stock Incentive Plan Twenty Twelve [Member] Stock Incentive Plan Twenty Twelve [Member] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Independent directors Director [Member] Employee Employee [Member] Employee [Member] Common shares authorized (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Shares available for issuance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Vesting rate Percentage Of Awards Vesting On Grant Date Percentage Of Awards Vesting On Grant Date Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Expiration period Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Total unrecognized stock-based compensation expense related to unvested stock options and restricted stock grants Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Weighted average recognition period Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Carrying value of assets tested for impairment Long-Lived Assets Tested for Impairment, Carrying Amount Long-Lived Assets Tested for Impairment, Carrying Amount Carrying value of assets with impairment Impaired Long-Lived Assets Held and Used, Carrying Amount Impaired Long-Lived Assets Held and Used, Carrying Amount Fair value of assets impaired Impaired Long-Lived Assets Held and Used, Fair Value Impaired Long-Lived Assets Held and Used, Fair Value Number of stores tested for impairment Number of Stores Tested for Impairment Number of Stores Tested for Impairment Number of stores with impairment Number of Stores with Impairment Number of Stores with Impairment Statement of Cash Flows [Abstract] Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Stock-based compensation expense Impairment of assets Asset Impairment Charges Loss on disposal of assets Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Gain on sales and maturities of marketable securities Deferred income taxes Deferred Income Tax Expense (Benefit) Excess tax benefit from stock-based compensation Excess Tax Benefit from Share-based Compensation, Operating Activities Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Receivables Increase (Decrease) in Receivables Merchandise inventories Increase (Decrease) in Inventories Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable Increase (Decrease) in Accounts Payable Accrued expenses Increase (Decrease) in Accrued Liabilities Accrued compensation and benefits Increase (Decrease) in Employee Related Liabilities Deferred rent Increase (Decrease) in Deferred Rent The net change during the reporting period in deferred rent. Deferred revenue Increase (Decrease) in Deferred Revenue Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Proceeds from sale of property and equipment Proceeds from Sale of Property, Plant, and Equipment Purchases of marketable securities Payments to Acquire Marketable Securities Maturities of marketable securities Proceeds from Sale and Maturity of Marketable Securities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Proceeds from exercise of stock options Proceeds from Stock Options Exercised Payment of capital lease obligation Repayments of Long-term Capital Lease Obligations Taxes paid in lieu of shares issued for stock-based compensation Payments Related to Tax Withholding for Share-based Compensation Excess tax benefit from stock-based compensation Excess Tax Benefit from Share-based Compensation, Financing Activities Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations Change in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Supplemental disclosures of cash flow information Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid Income taxes paid Income Taxes Paid, Net Supplemental disclosure of non-cash activities Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Unpaid purchases of property and equipment Capital Expenditures Incurred but Not yet Paid Financial Assets Categorized Based on Priority of Inputs to Valuation Technique Instruments Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table Text Block] Details of Impairment of Long-Lived Assets Details of Impairment of Long-Lived Assets Held and Used by Asset [Table Text Block] Income Statement [Abstract] Net sales Revenue, Net Cost of goods sold (includes buying, distribution, and occupancy costs) Cost of Goods Sold Gross profit Gross Profit Selling, general and administrative expenses Selling, General and Administrative Expense Operating income Operating Income (Loss) Other income (expense), net Other Nonoperating Income (Expense) Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) Net income Basic earnings per share of Class A and Class B common stock (in dollars per share) Weighted average diluted shares outstanding (in shares) Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Information [Table] Document Information [Table] Document Information [Line Items] Document Information [Line Items] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol 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 Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Marketable Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Line of Credit Debt Disclosure [Text Block] Fair Value Measurements Fair Value Disclosures [Text Block]