Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Stock Option Activity (Details)

v3.23.2
Stock-Based Compensation - Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2023
Dec. 31, 2022
2018 Stock Option and Incentive Plan    
Number of Shares    
Beginning balance (in shares) 87,500  
Granted (in shares) 75,000  
Exercised (in shares) 0  
Forfeited (in shares) (37,500)  
Ending balance (in shares) 125,000 87,500
Options exercisable (in shares) 106,250  
Weighted Average Exercise Price    
Beginning balance (in dollars per share) $ 1.43  
Granted (in dollars per share) 0.76  
Exercised (in dollars per share) 0  
Forfeited (in dollars per share) 1.08  
Ending balance (in dollars per share) 1.14 $ 1.43
Options exercisable (in dollars per share) $ 1.20  
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) 779,339  
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 1 month 6 days 4 years 2 months 12 days
Exercisable 4 years 1 month 6 days  
Aggregate Intrinsic Value    
Outstanding $ 1 $ 130
Exercisable $ 1