Stockholders equity - Warrants (Details) - $ / shares	Dec. 31, 2024	Dec. 31, 2023	Nov. 30, 2022	Oct. 31, 2022
Warrants
Number of Warrants	14,483,792	203,914
Warrants Exercise Price 44,820.00
Warrants
Number of Warrants	6	6
Exercise Price	$ 44,820
Warrants Exercise Price 3,000.00
Warrants
Number of Warrants	159	159
Exercise Price	$ 3,000
Warrants Exercise Price 1,447.20
Warrants
Number of Warrants	10,421	10,421
Exercise Price	$ 1,447.2
Warrants Exercise Price 900.00
Warrants
Number of Warrants	15,390	15,390
Exercise Price	$ 900
November 2022 Series B
Warrants
Number of Warrants	177,938	177,938
Exercise Price	$ 0		$ 0	$ 3
June 2024 Placement Agent
Warrants
Number of Warrants	127,227
Exercise Price	$ 4.91
June 2024 Pre-funded
Warrants
Number of Warrants	1,430,000
Exercise Price	$ 0
June 2024 Series A
Warrants
Number of Warrants	5,089,060
Exercise Price	$ 3.93
June 2024 Series B
Warrants
Number of Warrants	7,633,591
Exercise Price	$ 3.93