v3.26.1
Stockholders' equity - At the market offering, Private placement, Common stock issued for professional services (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
May 31, 2025
Jun. 30, 2026
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2026
Jul. 02, 2026
Nov. 30, 2025
Stockholders' equity              
Original issue price, per share $ 2.89            
Issuance of common stock for professional services (in shares) 50,000            
Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense              
Stockholders' equity              
Record of operating expenses   $ 100 $ 100        
Private Placement              
Stockholders' equity              
Offering expenses       $ 530      
At the market offering              
Stockholders' equity              
Maximum aggregate offering price           $ 4,000 $ 2,300
Percentage of sales agent commission             3.00%
Issuance of common stock (in shares)         422,919    
Net proceeds         $ 700    
Common stock capital reserved for future issuance   $ 200 200        
Offering expenses     $ 94        
Related party | Pre-Funded Warrants              
Stockholders' equity              
Warrants exercise price       $ 0.011      
Related party | Private Placement              
Stockholders' equity              
Issuance of common stock (in shares) 861,758            
Issuance of common stock and pre-funded warrants $ 9,100            
Cash fee payment to the placement agent 400            
Offering expenses $ 500            
Original issue price, per share $ 7.81            
Related party | Private Placement | Pre-Funded Warrants              
Stockholders' equity              
Original issue price, per share $ 7.799            
Number of pre-funded warrants 418,651