3.20.1 html 390 477 1 true 134 0 false 6 false false R1.htm 000 - Document - Document And Entity Information Sheet http://www.windtreetx.com/20200331/role/statement-document-and-entity-information Document And Entity Information Cover 1 false false R2.htm 001 - Statement - Consolidated Balance Sheets Sheet http://www.windtreetx.com/20200331/role/statement-consolidated-balance-sheets Consolidated Balance Sheets Statements 2 false false R3.htm 002 - Statement - Consolidated Balance Sheets (Parentheticals) Sheet http://www.windtreetx.com/20200331/role/statement-consolidated-balance-sheets-parentheticals Consolidated Balance Sheets (Parentheticals) Statements 3 false false R4.htm 003 - Statement - Consolidated Statements of Operations Sheet http://www.windtreetx.com/20200331/role/statement-consolidated-statements-of-operations Consolidated Statements of Operations Statements 4 false false R5.htm 004 - Statement - Consolidated Statements of Changes in Stockholders' Equity Sheet http://www.windtreetx.com/20200331/role/statement-consolidated-statements-of-changes-in-stockholders-equity Consolidated Statements of Changes in Stockholders' Equity Statements 5 false false R6.htm 005 - Statement - Consolidated Statements of Cash Flows Sheet http://www.windtreetx.com/20200331/role/statement-consolidated-statements-of-cash-flows Consolidated Statements of Cash Flows Statements 6 false false R7.htm 006 - Statement - Condensed Consolidated Balance Sheets (Current Period Unaudited) Sheet http://www.windtreetx.com/20200331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited Condensed Consolidated Balance Sheets (Current Period Unaudited) Statements 7 false false R8.htm 007 - Statement - Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) Sheet http://www.windtreetx.com/20200331/role/statement-condensed-consolidated-balance-sheets-current-period-unaudited-parentheticals Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) Statements 8 false false R9.htm 008 - Statement - Condensed Consolidated Statements of Operations (Unaudited) Sheet http://www.windtreetx.com/20200331/role/statement-condensed-consolidated-statements-of-operations-unaudited Condensed Consolidated Statements of Operations (Unaudited) Statements 9 false false R10.htm 009 - Statement - Condensed Consolidated Statements of Comprehensive Loss (Unaudited) Sheet http://www.windtreetx.com/20200331/role/statement-condensed-consolidated-statements-of-comprehensive-loss-unaudited Condensed Consolidated Statements of Comprehensive Loss (Unaudited) Statements 10 false false R11.htm 010 - Statement - Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) Sheet http://www.windtreetx.com/20200331/role/statement-condensed-consolidated-statements-of-changes-in-stockholders-equity-unaudited Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) Statements 11 false false R12.htm 011 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) Sheet http://www.windtreetx.com/20200331/role/statement-condensed-consolidated-statements-of-cash-flows-unaudited Condensed Consolidated Statements of Cash Flows (Unaudited) Statements 12 false false R13.htm 012 - Disclosure - Note 1 - The Company and Description of Business Sheet http://www.windtreetx.com/20200331/role/statement-note-1-the-company-and-description-of-business Note 1 - The Company and Description of Business Notes 13 false false R14.htm 013 - Disclosure - Note 2 - Basis of Presentation Sheet http://www.windtreetx.com/20200331/role/statement-note-2-basis-of-presentation Note 2 - Basis of Presentation Notes 14 false false R15.htm 014 - Disclosure - Note 3 - Business Combination Sheet http://www.windtreetx.com/20200331/role/statement-note-3-business-combination Note 3 - Business Combination Notes 15 false false R16.htm 015 - Disclosure - Note 4 - Liquidity Risks and Management's Plans Sheet http://www.windtreetx.com/20200331/role/statement-note-4-liquidity-risks-and-managements-plans- Note 4 - Liquidity Risks and Management's Plans Notes 16 false false R17.htm 016 - Disclosure - Note 5 - Accounting Policies and Recent Accounting Pronouncements Sheet http://www.windtreetx.com/20200331/role/statement-note-5-accounting-policies-and-recent-accounting-pronouncements Note 5 - Accounting Policies and Recent Accounting Pronouncements Notes 17 false false R18.htm 017 - Disclosure - Note 6 - License Revenue with Affiliate Sheet http://www.windtreetx.com/20200331/role/statement-note-6-license-revenue-with-affiliate Note 6 - License Revenue with Affiliate Notes 18 false false R19.htm 018 - Disclosure - Note 7 - Fair Value Measurements Sheet http://www.windtreetx.com/20200331/role/statement-note-7-fair-value-measurements- Note 7 - Fair Value Measurements Notes 19 false false R20.htm 019 - Disclosure - Note 8 - Property and Equipment Sheet http://www.windtreetx.com/20200331/role/statement-note-8-property-and-equipment Note 8 - Property and Equipment Notes 20 false false R21.htm 020 - Disclosure - Note 9 - Collaboration and Device Development Payable Sheet http://www.windtreetx.com/20200331/role/statement-note-9-collaboration-and-device-development-payable Note 9 - Collaboration and Device Development Payable Notes 21 false false R22.htm 021 - Disclosure - Note 10 - Accrued Expenses Sheet http://www.windtreetx.com/20200331/role/statement-note-10-accrued-expenses Note 10 - Accrued Expenses Notes 22 false false R23.htm 022 - Disclosure - Note 11 - Loan Payable - Current Portion and Non-current Portion Sheet http://www.windtreetx.com/20200331/role/statement-note-11-loan-payable-current-portion-and-noncurrent-portion Note 11 - Loan Payable - Current Portion and Non-current Portion Notes 23 false false R24.htm 023 - Disclosure - Note 12 - Convertible Note Payable Sheet http://www.windtreetx.com/20200331/role/statement-note-12-convertible-note-payable- Note 12 - Convertible Note Payable Notes 24 false false R25.htm 024 - Disclosure - Note 13 - Restructured Debt Liability Sheet http://www.windtreetx.com/20200331/role/statement-note-13-restructured-debt-liability Note 13 - Restructured Debt Liability Notes 25 false false R26.htm 025 - Disclosure - Note 14 - Stockholders' Equity Sheet http://www.windtreetx.com/20200331/role/statement-note-14-stockholders-equity Note 14 - Stockholders' Equity Notes 26 false false R27.htm 026 - Disclosure - Note 15 - Stock Options and Stock-based Employee Compensation Sheet http://www.windtreetx.com/20200331/role/statement-note-15-stock-options-and-stockbased-employee-compensation- Note 15 - Stock Options and Stock-based Employee Compensation Notes 27 false false R28.htm 027 - Disclosure - Note 16 - Collaboration, Licensing and Research Funding Agreements Sheet http://www.windtreetx.com/20200331/role/statement-note-16-collaboration-licensing-and-research-funding-agreements Note 16 - Collaboration, Licensing and Research Funding Agreements Notes 28 false false R29.htm 028 - Disclosure - Note 17 - Related Party Transactions Sheet http://www.windtreetx.com/20200331/role/statement-note-17-related-party-transactions Note 17 - Related Party Transactions Notes 29 false false R30.htm 029 - Disclosure - Note 18 - Commitments Sheet http://www.windtreetx.com/20200331/role/statement-note-18-commitments- Note 18 - Commitments Notes 30 false false R31.htm 030 - Disclosure - Note 19 - Litigation Sheet http://www.windtreetx.com/20200331/role/statement-note-19-litigation- Note 19 - Litigation Notes 31 false false R32.htm 031 - Disclosure - Note 20 - Income Taxes Sheet http://www.windtreetx.com/20200331/role/statement-note-20-income-taxes Note 20 - Income Taxes Notes 32 false false R33.htm 032 - Disclosure - Note 21 - Leases Sheet http://www.windtreetx.com/20200331/role/statement-note-21-leases Note 21 - Leases Notes 33 false false R34.htm 033 - Disclosure - Note 22 - Selected Quarterly Financial Data (Unaudited) Sheet http://www.windtreetx.com/20200331/role/statement-note-22-selected-quarterly-financial-data-unaudited Note 22 - Selected Quarterly Financial Data (Unaudited) Notes 34 false false R35.htm 034 - Disclosure - Note 23 - Subsequent Events Sheet http://www.windtreetx.com/20200331/role/statement-note-23-subsequent-events Note 23 - Subsequent Events Notes 35 false false R36.htm 035 - Disclosure - Note 1 - The Company and Description of Business Sheet http://www.windtreetx.com/20200331/role/statement-note-1-the-company-and-description-of-business574F44F2-4AE4-44CD-AE11-6B607FE5E817 Note 1 - The Company and Description of Business Notes 36 false false R37.htm 036 - Disclosure - Note 2 - Basis of Presentation Sheet http://www.windtreetx.com/20200331/role/statement-note-2-basis-of-presentationC6457373-B936-4396-AB7A-8C24B5DE5541 Note 2 - Basis of Presentation Notes 37 false false R38.htm 037 - Disclosure - Note 3 - Liquidity Risks and Management's Plans Sheet http://www.windtreetx.com/20200331/role/statement-note-3-liquidity-risks-and-managements-plans- Note 3 - Liquidity Risks and Management's Plans Notes 38 false false R39.htm 038 - Disclosure - Note 4 - Summary of Significant Accounting Policies Sheet http://www.windtreetx.com/20200331/role/statement-note-4-summary-of-significant-accounting-policies Note 4 - Summary of Significant Accounting Policies Notes 39 false false R40.htm 039 - Disclosure - Note 5 - Fair Value of Financial Instruments Sheet http://www.windtreetx.com/20200331/role/statement-note-5-fair-value-of-financial-instruments Note 5 - Fair Value of Financial Instruments Notes 40 false false R41.htm 040 - Disclosure - Note 6 - Collaboration and Device Development Payable Sheet http://www.windtreetx.com/20200331/role/statement-note-6-collaboration-and-device-development-payable Note 6 - Collaboration and Device Development Payable Notes 41 false false R42.htm 041 - Disclosure - Note 7 - Loans Payable Sheet http://www.windtreetx.com/20200331/role/statement-note-7-loans-payable Note 7 - Loans Payable Notes 42 false false R43.htm 042 - Disclosure - Note 8 - Restructured Debt Liability Sheet http://www.windtreetx.com/20200331/role/statement-note-8-restructured-debt-liability Note 8 - Restructured Debt Liability Notes 43 false false R44.htm 043 - Disclosure - Note 9 - Stock Options and Stock-based Employee Compensation Sheet http://www.windtreetx.com/20200331/role/statement-note-9-stock-options-and-stockbased-employee-compensation- Note 9 - Stock Options and Stock-based Employee Compensation Notes 44 false false R45.htm 044 - Disclosure - Note 10 - Collaboration, Licensing and Research Funding Agreements Sheet http://www.windtreetx.com/20200331/role/statement-note-10-collaboration-licensing-and-research-funding-agreements Note 10 - Collaboration, Licensing and Research Funding Agreements Notes 45 false false R46.htm 045 - Disclosure - Note 11 - Subsequent Events Sheet http://www.windtreetx.com/20200331/role/statement-note-11-subsequent-events Note 11 - Subsequent Events Notes 46 false false R47.htm 046 - Disclosure - Significant Accounting Policies (Policies) Sheet http://www.windtreetx.com/20200331/role/statement-significant-accounting-policies-policies Significant Accounting Policies (Policies) Policies http://www.windtreetx.com/20200331/role/statement-note-5-accounting-policies-and-recent-accounting-pronouncements 47 false false R48.htm 047 - Disclosure - Note 3 - Business Combination (Tables) Sheet http://www.windtreetx.com/20200331/role/statement-note-3-business-combination-tables Note 3 - Business Combination (Tables) Tables http://www.windtreetx.com/20200331/role/statement-note-3-business-combination 48 false false R49.htm 048 - Disclosure - Note 5 - Accounting Policies and Recent Accounting Pronouncements (Tables) Sheet http://www.windtreetx.com/20200331/role/statement-note-5-accounting-policies-and-recent-accounting-pronouncements-tables Note 5 - Accounting Policies and Recent Accounting Pronouncements (Tables) Tables http://www.windtreetx.com/20200331/role/statement-note-5-accounting-policies-and-recent-accounting-pronouncements 49 false false R50.htm 049 - Disclosure - Note 6 - License Revenue with Affiliate (Tables) Sheet http://www.windtreetx.com/20200331/role/statement-note-6-license-revenue-with-affiliate-tables Note 6 - License Revenue with Affiliate (Tables) Tables http://www.windtreetx.com/20200331/role/statement-note-6-license-revenue-with-affiliate 50 false false R51.htm 050 - Disclosure - Note 7 - Fair Value Measurements (Tables) Sheet http://www.windtreetx.com/20200331/role/statement-note-7-fair-value-measurements-tables Note 7 - Fair Value Measurements (Tables) Tables http://www.windtreetx.com/20200331/role/statement-note-7-fair-value-measurements- 51 false false R52.htm 051 - Disclosure - Note 8 - Property and Equipment (Tables) Sheet http://www.windtreetx.com/20200331/role/statement-note-8-property-and-equipment-tables Note 8 - Property and Equipment (Tables) Tables http://www.windtreetx.com/20200331/role/statement-note-8-property-and-equipment 52 false false R53.htm 052 - Disclosure - Note 9 - Collaboration and Device Development Payable (Tables) Sheet http://www.windtreetx.com/20200331/role/statement-note-9-collaboration-and-device-development-payable-tables Note 9 - Collaboration and Device Development Payable (Tables) Tables http://www.windtreetx.com/20200331/role/statement-note-9-collaboration-and-device-development-payable 53 false false R54.htm 053 - Disclosure - Note 10 - Accrued Expenses (Tables) Sheet http://www.windtreetx.com/20200331/role/statement-note-10-accrued-expenses-tables Note 10 - Accrued Expenses (Tables) Tables http://www.windtreetx.com/20200331/role/statement-note-10-accrued-expenses 54 false false R55.htm 054 - Disclosure - Note 12 - Convertible Note Payable (Tables) Sheet http://www.windtreetx.com/20200331/role/statement-note-12-convertible-note-payable-tables Note 12 - Convertible Note Payable (Tables) Tables http://www.windtreetx.com/20200331/role/statement-note-12-convertible-note-payable- 55 false false R56.htm 055 - Disclosure - Note 13 - Restructured Debt Liability (Tables) Sheet http://www.windtreetx.com/20200331/role/statement-note-13-restructured-debt-liability-tables Note 13 - Restructured Debt Liability (Tables) Tables http://www.windtreetx.com/20200331/role/statement-note-13-restructured-debt-liability 56 false false R57.htm 056 - Disclosure - Note 14 - Stockholders' Equity (Tables) Sheet http://www.windtreetx.com/20200331/role/statement-note-14-stockholders-equity-tables Note 14 - Stockholders' Equity (Tables) Tables http://www.windtreetx.com/20200331/role/statement-note-14-stockholders-equity 57 false false R58.htm 057 - Disclosure - Note 15 - Stock Options and Stock-based Employee Compensation (Tables) Sheet http://www.windtreetx.com/20200331/role/statement-note-15-stock-options-and-stockbased-employee-compensation-tables Note 15 - Stock Options and Stock-based Employee Compensation (Tables) Tables http://www.windtreetx.com/20200331/role/statement-note-15-stock-options-and-stockbased-employee-compensation- 58 false false R59.htm 058 - Disclosure - Note 20 - Income Taxes (Tables) Sheet http://www.windtreetx.com/20200331/role/statement-note-20-income-taxes-tables Note 20 - Income Taxes (Tables) Tables http://www.windtreetx.com/20200331/role/statement-note-20-income-taxes 59 false false R60.htm 059 - Disclosure - Note 21 - Leases (Tables) Sheet http://www.windtreetx.com/20200331/role/statement-note-21-leases-tables Note 21 - Leases (Tables) Tables http://www.windtreetx.com/20200331/role/statement-note-21-leases 60 false false R61.htm 060 - Disclosure - Note 22 - Selected Quarterly Financial Data (Unaudited) (Tables) Sheet http://www.windtreetx.com/20200331/role/statement-note-22-selected-quarterly-financial-data-unaudited-tables Note 22 - Selected Quarterly Financial Data (Unaudited) (Tables) Tables http://www.windtreetx.com/20200331/role/statement-note-22-selected-quarterly-financial-data-unaudited 61 false false R62.htm 061 - Disclosure - Note 4 - Summary of Significant Accounting Policies (Tables) Sheet http://www.windtreetx.com/20200331/role/statement-note-4-summary-of-significant-accounting-policies-tables Note 4 - Summary of Significant Accounting Policies (Tables) Tables http://www.windtreetx.com/20200331/role/statement-note-4-summary-of-significant-accounting-policies 62 false false R63.htm 062 - Disclosure - Note 5 - Fair Value of Financial Instruments (Tables) Sheet http://www.windtreetx.com/20200331/role/statement-note-5-fair-value-of-financial-instruments-tables Note 5 - Fair Value of Financial Instruments (Tables) Tables http://www.windtreetx.com/20200331/role/statement-note-5-fair-value-of-financial-instruments 63 false false R64.htm 063 - Disclosure - Note 9 - Stock Options and Stock-based Employee Compensation (Tables) Sheet http://www.windtreetx.com/20200331/role/statement-note-9-stock-options-and-stockbased-employee-compensation-tables Note 9 - Stock Options and Stock-based Employee Compensation (Tables) Tables http://www.windtreetx.com/20200331/role/statement-note-9-stock-options-and-stockbased-employee-compensation- 64 false false R65.htm 064 - Disclosure - Note 2 - Basis of Presentation (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-2-basis-of-presentation-details-textual Note 2 - Basis of Presentation (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-2-basis-of-presentation 65 false false R66.htm 065 - Disclosure - Note 3 - Business Combination (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-3-business-combination-details-textual Note 3 - Business Combination (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-3-business-combination-tables 66 false false R67.htm 066 - Disclosure - Note 3 - Business Combination - Warrant Valuation Assumptions (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-3-business-combination-warrant-valuation-assumptions-details Note 3 - Business Combination - Warrant Valuation Assumptions (Details) Details 67 false false R68.htm 067 - Disclosure - Note 3 - Business Combination - Assets Acquired and Liabilities Assumed (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-3-business-combination-assets-acquired-and-liabilities-assumed-details Note 3 - Business Combination - Assets Acquired and Liabilities Assumed (Details) Details 68 false false R69.htm 068 - Disclosure - Note 3 - Business Combination - Pro Forma Information (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-3-business-combination-pro-forma-information-details Note 3 - Business Combination - Pro Forma Information (Details) Details 69 false false R70.htm 069 - Disclosure - Note 4 - Liquidity Risks and Management's Plans (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-4-liquidity-risks-and-managements-plans-details-textual Note 4 - Liquidity Risks and Management's Plans (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-4-liquidity-risks-and-managements-plans- 70 false false R71.htm 070 - Disclosure - Note 5 - Accounting Policies and Recent Accounting Pronouncements (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-5-accounting-policies-and-recent-accounting-pronouncements-details-textual Note 5 - Accounting Policies and Recent Accounting Pronouncements (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-5-accounting-policies-and-recent-accounting-pronouncements-tables 71 false false R72.htm 071 - Disclosure - Note 5 - Accounting Policies and Recent Accounting Pronouncements - Intangible Assets (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-5-accounting-policies-and-recent-accounting-pronouncements-intangible-assets-details Note 5 - Accounting Policies and Recent Accounting Pronouncements - Intangible Assets (Details) Details 72 false false R73.htm 072 - Disclosure - Note 6 - License Revenue with Affiliate - Disaggregation of Revenue (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-6-license-revenue-with-affiliate-disaggregation-of-revenue-details Note 6 - License Revenue with Affiliate - Disaggregation of Revenue (Details) Details 73 false false R74.htm 073 - Disclosure - Note 7 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-7-fair-value-measurements-assets-and-liabilities-measured-at-fair-value-details Note 7 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value (Details) Details 74 false false R75.htm 074 - Disclosure - Note 8 - Property and Equipment (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-8-property-and-equipment-details-textual Note 8 - Property and Equipment (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-8-property-and-equipment-tables 75 false false R76.htm 075 - Disclosure - Note 8 - Property and Equipment - Property and Equipment (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-8-property-and-equipment-property-and-equipment-details Note 8 - Property and Equipment - Property and Equipment (Details) Details 76 false false R77.htm 076 - Disclosure - Note 9 - Collaboration and Device Development Payable (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-9-collaboration-and-device-development-payable-details-textual Note 9 - Collaboration and Device Development Payable (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-9-collaboration-and-device-development-payable-tables 77 false false R78.htm 077 - Disclosure - Note 9 - Collaboration and Device Development Payable - Significant Input Assumptions of Warrant Valuation (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-9-collaboration-and-device-development-payable-significant-input-assumptions-of-warrant-valuation-details Note 9 - Collaboration and Device Development Payable - Significant Input Assumptions of Warrant Valuation (Details) Details 78 false false R79.htm 078 - Disclosure - Note 10 - Accrued Expenses - Accrued Expenses (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-10-accrued-expenses-accrued-expenses-details Note 10 - Accrued Expenses - Accrued Expenses (Details) Details 79 false false R80.htm 079 - Disclosure - Note 11 - Loan Payable - Current Portion and Non-current Portion (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-11-loan-payable-current-portion-and-noncurrent-portion-details-textual Note 11 - Loan Payable - Current Portion and Non-current Portion (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-11-loan-payable-current-portion-and-noncurrent-portion 80 false false R81.htm 080 - Disclosure - Note 12 - Convertible Note Payable (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-12-convertible-note-payable-details-textual Note 12 - Convertible Note Payable (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-12-convertible-note-payable-tables 81 false false R82.htm 081 - Disclosure - Note 12 - Convertible Note Payable - Significant Input Assumptions of Warrant Valuation (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-12-convertible-note-payable-significant-input-assumptions-of-warrant-valuation-details Note 12 - Convertible Note Payable - Significant Input Assumptions of Warrant Valuation (Details) Details 82 false false R83.htm 082 - Disclosure - Note 13 - Restructured Debt Liability (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-13-restructured-debt-liability-details-textual Note 13 - Restructured Debt Liability (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-13-restructured-debt-liability-tables 83 false false R84.htm 083 - Disclosure - Note 13 - Restructured Debt Liability - Long-term Debt (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-13-restructured-debt-liability-longterm-debt-details Note 13 - Restructured Debt Liability - Long-term Debt (Details) Details 84 false false R85.htm 084 - Disclosure - Note 14 - Stockholders' Equity (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-14-stockholders-equity-details-textual Note 14 - Stockholders' Equity (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-14-stockholders-equity-tables 85 false false R86.htm 085 - Disclosure - Note 14 - Stockholders' Equity - Common Shares Reserved for Future Issuance (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-14-stockholders-equity-common-shares-reserved-for-future-issuance-details Note 14 - Stockholders' Equity - Common Shares Reserved for Future Issuance (Details) Details 86 false false R87.htm 086 - Disclosure - Note 15 - Stock Options and Stock-based Employee Compensation (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-15-stock-options-and-stockbased-employee-compensation-details-textual Note 15 - Stock Options and Stock-based Employee Compensation (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-15-stock-options-and-stockbased-employee-compensation-tables 87 false false R88.htm 087 - Disclosure - Note 15 - Stock Options and Stock-based Employee Compensation - Stock Options and Restricted Stock Units (RSUs) Outstanding and Available for Future Issuance (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-15-stock-options-and-stockbased-employee-compensation-stock-options-and-restricted-stock-units-rsus-outstanding-and-available-for-future-issuance-details Note 15 - Stock Options and Stock-based Employee Compensation - Stock Options and Restricted Stock Units (RSUs) Outstanding and Available for Future Issuance (Details) Details 88 false false R89.htm 088 - Disclosure - Note 15 - Stock Options and Stock-based Employee Compensation - Summary of Stock Option Activity (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-15-stock-options-and-stockbased-employee-compensation-summary-of-stock-option-activity-details Note 15 - Stock Options and Stock-based Employee Compensation - Summary of Stock Option Activity (Details) Details 89 false false R90.htm 089 - Disclosure - Note 15 - Stock Options and Stock-based Employee Compensation - Summary of Restricted Stock Units Activity (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-15-stock-options-and-stockbased-employee-compensation-summary-of-restricted-stock-units-activity-details Note 15 - Stock Options and Stock-based Employee Compensation - Summary of Restricted Stock Units Activity (Details) Details 90 false false R91.htm 090 - Disclosure - Note 15 - Stock Options and Stock-based Employee Compensation - Stock-based Compensation Expense (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-15-stock-options-and-stockbased-employee-compensation-stockbased-compensation-expense-details Note 15 - Stock Options and Stock-based Employee Compensation - Stock-based Compensation Expense (Details) Details 91 false false R92.htm 091 - Disclosure - Note 15 - Stock Options and Stock-based Employee Compensation - Stock Options Valuation Assumptions (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-15-stock-options-and-stockbased-employee-compensation-stock-options-valuation-assumptions-details Note 15 - Stock Options and Stock-based Employee Compensation - Stock Options Valuation Assumptions (Details) Details 92 false false R93.htm 092 - Disclosure - Note 16 - Collaboration, Licensing and Research Funding Agreements (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-16-collaboration-licensing-and-research-funding-agreements-details-textual Note 16 - Collaboration, Licensing and Research Funding Agreements (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-16-collaboration-licensing-and-research-funding-agreements 93 false false R94.htm 093 - Disclosure - Note 17 - Related Party Transactions (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-17-related-party-transactions-details-textual Note 17 - Related Party Transactions (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-17-related-party-transactions 94 false false R95.htm 094 - Disclosure - Note 20 - Income Taxes (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-20-income-taxes-details-textual Note 20 - Income Taxes (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-20-income-taxes-tables 95 false false R96.htm 095 - Disclosure - Note 20 - Income Taxes - Income Tax Reconciliation (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-20-income-taxes-income-tax-reconciliation-details Note 20 - Income Taxes - Income Tax Reconciliation (Details) Details 96 false false R97.htm 096 - Disclosure - Note 20 - Income Taxes - Deferred Tax Assets (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-20-income-taxes-deferred-tax-assets-details Note 20 - Income Taxes - Deferred Tax Assets (Details) Details 97 false false R98.htm 097 - Disclosure - Note 21 - Leases (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-21-leases-details-textual Note 21 - Leases (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-21-leases-tables 98 false false R99.htm 098 - Disclosure - Note 21 - Leases - Lease Costs (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-21-leases-lease-costs-details Note 21 - Leases - Lease Costs (Details) Details 99 false false R100.htm 099 - Disclosure - Note 21 - Leases - Future Minimum Lease Payments (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-21-leases-future-minimum-lease-payments-details Note 21 - Leases - Future Minimum Lease Payments (Details) Details 100 false false R101.htm 100 - Disclosure - Note 22 - Selected Quarterly Financial Data (Unaudited) - Schedule of Quarterly Financial Data (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-22-selected-quarterly-financial-data-unaudited-schedule-of-quarterly-financial-data-details Note 22 - Selected Quarterly Financial Data (Unaudited) - Schedule of Quarterly Financial Data (Details) Details http://www.windtreetx.com/20200331/role/statement-note-22-selected-quarterly-financial-data-unaudited-tables 101 false false R102.htm 101 - Disclosure - Note 23 - Subsequent Events (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-23-subsequent-events-details-textual Note 23 - Subsequent Events (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-23-subsequent-events 102 false false R103.htm 102 - Disclosure - Note 2 - Basis of Presentation (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-2-basis-of-presentation-details-textual49384B4C-16F0-4CEE-AD3C-6240B68DCB14 Note 2 - Basis of Presentation (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-2-basis-of-presentation 103 false false R104.htm 103 - Disclosure - Note 3 - Liquidity Risks and Management's Plans (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-3-liquidity-risks-and-managements-plans-details-textual Note 3 - Liquidity Risks and Management's Plans (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-3-liquidity-risks-and-managements-plans- 104 false false R105.htm 104 - Disclosure - Note 4 - Summary of Significant Accounting Policies (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-4-summary-of-significant-accounting-policies-details-textual Note 4 - Summary of Significant Accounting Policies (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-4-summary-of-significant-accounting-policies-tables 105 false false R106.htm 105 - Disclosure - Note 4 - Summary of Significant Accounting Policies - Intangible Assets (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-4-summary-of-significant-accounting-policies-intangible-assets-details Note 4 - Summary of Significant Accounting Policies - Intangible Assets (Details) Details 106 false false R107.htm 106 - Disclosure - Note 5 - Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-5-fair-value-of-financial-instruments-assets-and-liabilities-measured-at-fair-value-details Note 5 - Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value (Details) Details 107 false false R108.htm 107 - Disclosure - Note 6 - Collaboration and Device Development Payable (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-6-collaboration-and-device-development-payable-details-textual Note 6 - Collaboration and Device Development Payable (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-6-collaboration-and-device-development-payable 108 false false R109.htm 108 - Disclosure - Note 7 - Loans Payable (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-7-loans-payable-details-textual Note 7 - Loans Payable (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-7-loans-payable 109 false false R110.htm 109 - Disclosure - Note 8 - Restructured Debt Liability (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-8-restructured-debt-liability-details-textual Note 8 - Restructured Debt Liability (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-8-restructured-debt-liability 110 false false R111.htm 110 - Disclosure - Note 9 - Stock Options and Stock-based Employee Compensation (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-9-stock-options-and-stockbased-employee-compensation-details-textual Note 9 - Stock Options and Stock-based Employee Compensation (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-9-stock-options-and-stockbased-employee-compensation-tables 111 false false R112.htm 111 - Disclosure - Note 9 - Stock Options and Stock-based Employee Compensation - Summary of Stock Option Activity (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-9-stock-options-and-stockbased-employee-compensation-summary-of-stock-option-activity-details Note 9 - Stock Options and Stock-based Employee Compensation - Summary of Stock Option Activity (Details) Details 112 false false R113.htm 112 - Disclosure - Note 9 - Stock Options and Stock-based Employee Compensation - Stock-based Compensation Expense (Details) Sheet http://www.windtreetx.com/20200331/role/statement-note-9-stock-options-and-stockbased-employee-compensation-stockbased-compensation-expense-details Note 9 - Stock Options and Stock-based Employee Compensation - Stock-based Compensation Expense (Details) Details 113 false false R114.htm 113 - Disclosure - Note 10 - Collaboration, Licensing and Research Funding Agreements (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-10-collaboration-licensing-and-research-funding-agreements-details-textual Note 10 - Collaboration, Licensing and Research Funding Agreements (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-10-collaboration-licensing-and-research-funding-agreements 114 false false R115.htm 114 - Disclosure - Note 11 - Subsequent Events (Details Textual) Sheet http://www.windtreetx.com/20200331/role/statement-note-11-subsequent-events-details-textual Note 11 - Subsequent Events (Details Textual) Details http://www.windtreetx.com/20200331/role/statement-note-11-subsequent-events 115 false false All Reports Book All Reports wint-20200331.xml wint-20200331.xsd wint-20200331_cal.xml wint-20200331_def.xml wint-20200331_lab.xml wint-20200331_pre.xml http://fasb.org/srt/2020-01-31 http://xbrl.sec.gov/dei/2019-01-31 http://fasb.org/us-gaap/2020-01-31 true true