Fair value measurements - Financing Note (Details) - Financing Note	3 Months Ended
	Mar. 31, 2024 $ / shares Y
Fair Value measurements
Maturity date	Dec. 19, 2026
Principal
Fair Value measurements
Debt instrument, measurement input	2,330
Discount rate
Fair Value measurements
Debt instrument, measurement input	0.2500
Note term
Fair Value measurements
Debt instrument, measurement input | Y	2.72
Stock Price
Fair Value measurements
Debt instrument, measurement input | $ / shares	2.26
Risk rate
Fair Value measurements
Debt instrument, measurement input	0.0434
Volatility
Fair Value measurements
Debt instrument, measurement input	0.3633