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Shareholders’ equity (Tables)
 9 Months Ended
Sep. 30, 2025
Stockholders' Equity Note [Abstract]  
Schedule of stock based compensation expense
The table below summarizes information about the Company’s stock-based compensation for the three and nine months ended September 30, 2025 and 2024 and the expense recognized in the condensed consolidated statements of operations:
Three Months Ended September 30,Nine Months Ended September 30,
2025202420252024
(in thousands, except share and per share data)
Stock options
Options granted during period557,600 — 5,263,722 4,163,000 
Weighted average exercise price$3.39 $— $3.33 $2.49 
Restricted stock units (RSUs)
Restricted stock units granted during period1,066,609 — 1,968,509 1,316,200 
Grant date fair value$3.82 $— $3.58 $2.40 
Stock compensation expense
Research and development$566 $847 $1,495 $3,007 
General and administrative636 1,313 1,764 4,347 
Total stock compensation expense$1,202 $2,160 $3,259 $7,354