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Stock based compensation (Details) - shares
3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Jun. 17, 2021
Stock Options        
Stock based compensation        
Stock awards vesting period 4 years      
2021 Incentive Plan        
Stock based compensation        
Percentage of common stock outstanding   (5.00%)    
Increase in common stock reserved 2,954,788 2,750,276 2,750,276  
Shares available for grant 4,863,670 5,786,358    
2021 Incentive Plan | Stock Options        
Stock based compensation        
Shares authorized for issuance       5,481,735
Shares available for grant       5,640,711
Stock reserved for issuance upon the exercise of previously granted stock options       158,976