Common stock and additional paid-in capital - Share-Based Payment Arrangement, Performance Shares, Activity (Details) - Performance Shares	12 Months Ended
	Dec. 31, 2024 $ / shares shares
Number of RSUs
Beginning balance (in shares) | shares
Granted (in shares) | shares	466,876
Ending balance (in shares) | shares	466,876
Weighted average share price on grant
Beginning balance (in dollars per share) | $ / shares
Granted (in dollars per share) | $ / shares	0.82
Ending balance (in dollars per share) | $ / shares	$ 0.82