001 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) link:presentationLink link:definitionLink link:calculationLink 002 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parentheticals) link:presentationLink link:definitionLink link:calculationLink 003 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) link:presentationLink link:definitionLink link:calculationLink 004 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) link:presentationLink link:definitionLink link:calculationLink 005 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' DEFICIT (UNAUDITED) link:presentationLink link:definitionLink link:calculationLink 006 - Disclosure - Basis of Presentation and Liquidity link:presentationLink link:definitionLink link:calculationLink 007 - Disclosure - Accrued Expenses and Other link:presentationLink link:definitionLink link:calculationLink 008 - Disclosure - Convertible Notes Payable – Related Party link:presentationLink link:definitionLink link:calculationLink 009 - Disclosure - Fair Value of Financial Instruments link:presentationLink link:definitionLink link:calculationLink 010 - Disclosure - Stock-Based Compensation link:presentationLink link:definitionLink link:calculationLink 011 - Disclosure - Common Stock Warrants link:presentationLink link:definitionLink link:calculationLink 012 - Disclosure - Loss Per Share link:presentationLink link:definitionLink link:calculationLink 013 - Disclosure - Common Stock link:presentationLink link:definitionLink link:calculationLink 014 - Disclosure - Convertible Line of Credit - Related Party and Supplemental Convertible Lines of Credit - Related Party link:presentationLink link:definitionLink link:calculationLink 015 - Disclosure - Segments link:presentationLink link:definitionLink link:calculationLink 016 - Disclosure - Commitments and Contingencies link:presentationLink link:definitionLink link:calculationLink 017 - Disclosure - Leases link:presentationLink link:definitionLink link:calculationLink 018 - Disclosure - Galectin Sciences LLC link:presentationLink link:definitionLink link:calculationLink 996000 - Disclosure - Accrued Expenses and Other (Tables) link:presentationLink link:definitionLink link:calculationLink 996001 - Disclosure - Fair Value of Financial Instruments (Tables) link:presentationLink link:definitionLink link:calculationLink 996002 - Disclosure - Stock-Based Compensation (Tables) link:presentationLink link:definitionLink link:calculationLink 996003 - Disclosure - Common Stock Warrants (Tables) link:presentationLink link:definitionLink link:calculationLink 996004 - Disclosure - Loss Per Share (Tables) link:presentationLink link:definitionLink link:calculationLink 996005 - Disclosure - Segments (Tables) link:presentationLink link:definitionLink link:calculationLink 996006 - Disclosure - Basis of Presentation and Liquidity (Details) link:presentationLink link:definitionLink link:calculationLink 996007 - Disclosure - Accrued Expenses and Other - Accrued Expenses (Details) link:presentationLink link:definitionLink link:calculationLink 996008 - Disclosure - Convertible Notes Payable – Related Party (Details) link:presentationLink link:definitionLink link:calculationLink 996009 - Disclosure - Fair Value of Financial Instruments (Details) link:presentationLink link:definitionLink link:calculationLink 996010 - Disclosure - Fair Value of Financial Instruments - Assets and Liabilities Measured and Recorded at Fair Value on Recurring Basis (Details) link:presentationLink link:definitionLink link:calculationLink 996011 - Disclosure - Fair Value of Financial Instruments - April Note, Key Assumptions (Details) link:presentationLink link:definitionLink link:calculationLink 996012 - Disclosure - Fair Value of Financial Instruments - Roll Forward of April Note Derivative Liability (Details) link:presentationLink link:definitionLink link:calculationLink 996013 - Disclosure - Fair Value of Financial Instruments - September Note, Key Assumptions (Details) link:presentationLink link:definitionLink link:calculationLink 996014 - Disclosure - Fair Value of Financial Instruments - Roll Forward of September Note Derivative Liability (Details) link:presentationLink link:definitionLink link:calculationLink 996015 - Disclosure - Fair Value of Financial Instruments - December Note, Key Assumptions (Details) link:presentationLink link:definitionLink link:calculationLink 996016 - Disclosure - Fair Value of Financial Instruments - Roll Forward of December Note Derivative Liability (Details) link:presentationLink link:definitionLink link:calculationLink 996017 - Disclosure - Stock-Based Compensation (Details) link:presentationLink link:definitionLink link:calculationLink 996018 - Disclosure - Stock-Based Compensation - Components of Stock-Based Compensation Expense (Details) link:presentationLink link:definitionLink link:calculationLink 996019 - Disclosure - Stock-Based Compensation - Stock Option Activity (Details) link:presentationLink link:definitionLink link:calculationLink 996020 - Disclosure - Stock-Based Compensation - Weighted Average Assumptions Used to Determine Fair Value of Options Granted (Details) link:presentationLink link:definitionLink link:calculationLink 996021 - Disclosure - Common Stock Warrants (Details) link:presentationLink link:definitionLink link:calculationLink 996022 - Disclosure - Common Stock Warrants - Common Stock Warrants (Details) link:presentationLink link:definitionLink link:calculationLink 996023 - Disclosure - Loss Per Share - Loss Per Share (Details) link:presentationLink link:definitionLink link:calculationLink 996024 - Disclosure - Common Stock (Details) link:presentationLink link:definitionLink link:calculationLink 996025 - Disclosure - Convertible Line of Credit - Related Party and Supplemental Convertible Lines of Credit - Related Party (Details) link:presentationLink link:definitionLink link:calculationLink 996026 - Disclosure - Segments (Details) link:presentationLink link:definitionLink link:calculationLink 996027 - Disclosure - Segments - Significant Expense and Asset Categories (Details) link:presentationLink link:definitionLink link:calculationLink 996028 - Disclosure - Commitments and Contingencies (Details) link:presentationLink link:definitionLink link:calculationLink 996029 - Disclosure - Leases (Details) link:presentationLink link:definitionLink link:calculationLink 996030 - Disclosure - Galectin Sciences LLC (Details) link:presentationLink link:definitionLink link:calculationLink 000 - Document - Document And Entity Information link:presentationLink link:definitionLink link:calculationLink