1001 - Document - Cover link:presentationLink link:definitionLink link:calculationLink 1002 - Statement - Condensed Consolidated Balance Sheets (Unaudited) link:presentationLink link:definitionLink link:calculationLink 1003 - Statement - Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) link:presentationLink link:definitionLink link:calculationLink 1004 - Statement - Condensed Consolidated Statements of Operations (Unaudited) link:presentationLink link:definitionLink link:calculationLink 1005 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) link:presentationLink link:definitionLink link:calculationLink 1006 - Statement - Condensed Consolidated Statements of Changes in Redeemable Convertible Preferred Stock and Stockholders' Equity (Unaudited) link:presentationLink link:definitionLink link:calculationLink 1007 - Disclosure - Basis of Presentation link:presentationLink link:definitionLink link:calculationLink 1008 - Disclosure - Accrued Expenses and Other link:presentationLink link:definitionLink link:calculationLink 1009 - Disclosure - Line of Credit link:presentationLink link:definitionLink link:calculationLink 1010 - Disclosure - Stock-Based Compensation link:presentationLink link:definitionLink link:calculationLink 1011 - Disclosure - Common Stock Warrants link:presentationLink link:definitionLink link:calculationLink 1012 - Disclosure - Fair Value of Financial Instruments link:presentationLink link:definitionLink link:calculationLink 1013 - Disclosure - Loss Per Share link:presentationLink link:definitionLink link:calculationLink 1014 - Disclosure - Common Stock link:presentationLink link:definitionLink link:calculationLink 1015 - Disclosure - Preferred Stock Conversion into Common Stock link:presentationLink link:definitionLink link:calculationLink 1016 - Disclosure - Commitments and Contingencies link:presentationLink link:definitionLink link:calculationLink 1017 - Disclosure - Leases link:presentationLink link:definitionLink link:calculationLink 1018 - Disclosure - Galectin Sciences LLC link:presentationLink link:definitionLink link:calculationLink 1019 - Disclosure - Accrued Expenses and Other (Tables) link:presentationLink link:definitionLink link:calculationLink 1020 - Disclosure - Stock-Based Compensation (Tables) link:presentationLink link:definitionLink link:calculationLink 1021 - Disclosure - Common Stock Warrants (Tables) link:presentationLink link:definitionLink link:calculationLink 1022 - Disclosure - Loss Per Share (Tables) link:presentationLink link:definitionLink link:calculationLink 1023 - Disclosure - Leases (Tables) link:presentationLink link:definitionLink link:calculationLink 1024 - Disclosure - Basis of Presentation - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 1025 - Disclosure - Accrued Expenses and Other (Detail) link:presentationLink link:definitionLink link:calculationLink 1026 - Disclosure - Line of Credit - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 1027 - Disclosure - Stock-Based Compensation - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 1028 - Disclosure - Stock-Based Compensation Expense Related to Common Stock Options, Restricted Common Stock and Common Stock Warrants (Detail) link:presentationLink link:definitionLink link:calculationLink 1029 - Disclosure - Summary of Stock Option Activity (Detail) link:presentationLink link:definitionLink link:calculationLink 1030 - Disclosure - Weighted Average Assumptions Used to Determine Fair Value of Options Granted (Detail) link:presentationLink link:definitionLink link:calculationLink 1031 - Disclosure - Common Stock Warrant Activity (Detail) link:presentationLink link:definitionLink link:calculationLink 1032 - Disclosure - Common Stock Warrants (Parenthetical) (Details) link:presentationLink link:definitionLink link:calculationLink 1033 - Disclosure - Dilutive Shares Which Could Exist Pursuant to Exercise of Outstanding Stock Instruments and Which were not Included in Calculation (Detail) link:presentationLink link:definitionLink link:calculationLink 1034 - Disclosure - Common Stock - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 1035 - Disclosure - Preferred Stock Conversion into Common Stock - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 1036 - Disclosure - Leases Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink 1037 - Disclosure - Leases - Maturity of operating lease (Details) link:presentationLink link:definitionLink link:calculationLink 1038 - Disclosure - Galectin Science LLC - Additional Information (Detail) link:presentationLink link:definitionLink link:calculationLink