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Stock-Based Compensation - Stock option activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Shares Available for Grant      
Outstanding as of beginning of year 3,538,268    
2022 Equity incentive plan increase 1,917,456    
Granted (20,000)    
Forfeited 835,212    
Outstanding as of ending of year 6,270,936   3,538,268
Number of Shares Outstanding      
Outstanding as of beginning of year 10,081,915    
Granted 20,000    
Exercised (213,020)    
Forfeited (835,212)    
Outstanding as of ending of year 9,053,683   10,081,915
Vested and exercisable 5,405,758    
Weighted Average Exercise Price      
Outstanding as of beginning of year $ 3.11    
Granted 1.67    
Exercised 1.05    
Forfeited 5.03    
Outstanding as of ending of year 2.98   $ 3.11
Vested and exercisable as of ending of year $ 2.15    
Weighted Average Remaining Contractual Life (Years)      
Outstanding as of ending of year 7 years 3 months 7 days   7 years 7 months 9 days
Vested and exercisable as of ending of year 6 years 4 months 9 days    
Aggregate Intrinsic Value      
Aggregate Intrinsic Value, outstanding $ 333   $ 4,099
Vested and exercisable $ 333    
Weighted average grant date fair value of options granted $ 0.92    
Share based payment award shares options exercise 213,020 98,001  
Fair value of the shares subject to stock options vested $ 793,000 $ 284  
Unamortized stock-based compensation expense $ 7    
Vesting term (in years) 2 years 2 months 12 days