Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Stock Option Activity (Details)

v3.23.1
Stock-Based Compensation - Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
2018 Stock Option and Incentive Plan    
Number of Shares    
Beginning balance (in shares) 87,500  
Granted (in shares) 0  
Exercised (in shares) 0  
Forfeited (in shares) 0  
Ending balance (in shares) 87,500 87,500
Options exercisable (in shares) 87,500  
Weighted Average Exercise Price    
Beginning balance (in dollars per share) $ 1.43  
Granted (in dollars per share) 0  
Exercised (in dollars per share) 0  
Forfeited (in dollars per share) 0  
Ending balance (in dollars per share) 1.43 $ 1.43
Options exercisable (in dollars per share) $ 1.43  
Weighted Average Remaining Contractual Term (years)    
Outstanding 5 years 4 months 24 days 5 years 7 months 6 days
Exercisable 5 years 4 months 24 days  
Aggregate Intrinsic Value    
Outstanding $ 0 $ 0
Exercisable $ 0  
2009 Equity Incentive Plan    
Number of Shares    
Beginning balance (in shares) 874,279  
Granted (in shares) 0  
Exercised (in shares) (94,748)  
Forfeited (in shares) 0  
Ending balance (in shares) 779,531 874,279
Options exercisable (in shares) 779,138  
Weighted Average Exercise Price    
Beginning balance (in dollars per share) $ 0.80  
Granted (in dollars per share) 0  
Exercised (in dollars per share) 0.61  
Forfeited (in dollars per share) 0  
Ending balance (in dollars per share) 0.83 $ 0.80
Options exercisable (in dollars per share) $ 0.83  
Weighted Average Remaining Contractual Term (years)    
Outstanding 4 years 6 months 4 years 2 months 12 days
Exercisable 4 years 6 months  
Aggregate Intrinsic Value    
Outstanding $ 73 $ 130
Exercisable $ 73