Summary of significant accounting policies - Anti-dilutive (Details) - shares	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share, Diluted, Other Disclosures [Abstract]
Anti-dilutive securities	8,478,291	3,822,517
Employee Stock Option [Member]
Earnings Per Share, Diluted, Other Disclosures [Abstract]
Anti-dilutive securities	7,978,291	2,519,405
Common stock warrants
Earnings Per Share, Diluted, Other Disclosures [Abstract]
Anti-dilutive securities	500,000	1,303,112

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 260
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482662/260-10-50-1

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration