Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Stock option plan (Details)

v3.23.1
Stock-Based Compensation - Stock option plan (Details) - $ / shares
3 Months Ended 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Shares Underlying Options      
Outstanding at beginning (in shares) 3,979,533    
Granted (in dollars per share) 0 0  
Forfeited (in dollars per share) (18,252)    
Exercised (in dollars per share) (250)    
Outstanding at ending (in shares) 3,961,031   3,979,533
Exercisable at the end (in shares) 3,899,158    
Weighted Average Exercise Price      
Outstanding at beginning (in dollars per share) $ 0.65    
Granted (in dollars per share) 0    
Forfeited (in dollars per share) 0.49    
Exercised (in dollars per share) 0.47    
Outstanding at ending (in dollars per share) 0.63   $ 0.65
Exercisable (in dollars per share) $ 0.65    
Weighted Average Remaining Contractual Term (in years)      
Outstanding (in years) 4 years 4 months 13 days   5 years 8 months 1 day
Exercisable at the end 4 years 4 months 2 days