Note 18 - Subsequent Events	12 Months Ended
Dec. 31, 2025
Notes to Financial Statements
Subsequent Events [Text Block]	18. Subsequent Events Subsequent to the balance sheet date, on January 9, 2026, the Company formed a wholly-owned subsidiary, Harvard Apparatus Regenerative Technology Incorporated, a California corporation, in connection with the submission of a grant application to the California Institute for Regenerative Medicine ("CIRM").

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/855/tableOfContent

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

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