3.26.1 html 5 52 2 false 2 0 false 3 false false R1.htm 000 - Document - Document And Entity Information Sheet http://www.moleculin.com/20251231/role/statement-document-and-entity-information Document And Entity Information Cover 1 false false R2.htm 995210 - Document - Submission Sheet http://xbrl.sec.gov/ffd/role/document/submissionTable Submission Cover 2 true false R3.htm 995211 - Document - Offerings Sheet http://xbrl.sec.gov/ffd/role/document/feesOfferingTable Offerings Cover 3 false false R4.htm 995212 - Document - Offsets Sheet http://xbrl.sec.gov/ffd/role/document/feesOffsetTable Offsets Cover 4 false false R5.htm 995215 - Document - Fees Summary Sheet http://xbrl.sec.gov/ffd/role/document/feesSummaryTable Fees Summary Cover 5 false false All Reports Book All Reports mbrx-20251231.xsd mbrx-20251231_def.xml mbrx-20251231_lab.xml mbrx-20251231_pre.xml mbrx20260315_s3.htm ex_933029.htm a01.jpg http://xbrl.sec.gov/dei/2025 http://xbrl.sec.gov/dei/2026 http://xbrl.sec.gov/ffd/2026 true false