Quarterly report pursuant to Section 13 or 15(d)

Stock Plans (Tables)

v3.22.2.2
Stock Plans (Tables)
9 Months Ended
Sep. 30, 2022
Share-Based Payment Arrangement [Abstract]  
Schedule of our option activity
                               
                Weighted        
          Weighted     Average        
          Average     Remaining     Aggregate  
          Exercise     Option     Intrinsic  
    Options (in     Price per     Term     Value  
    thousands)     share     (in years)     (in thousands)  
Outstanding at December 31, 2021     682     $ 12.53       8.98     $  
Granted     310       1.18                  
Forfeited or expired     (53 )     18.01                  
Outstanding at September 30, 2022     939     $ 8.48       8.57     $  
Exercisable at September 30, 2022     939     $ 8.48       8.57     $  
Schedule of the stock-based compensation expense
                               
    Three Months Ended     Nine Months Ended  
(in thousands)   September 30,     September 30,  
    2022     2021     2022     2021  
Research and development   $ 306     $ 325     $ 553     $ 659  
Selling, general and administrative     217       330       414       691  
Total stock-based compensation   $ 523     $ 655     $ 967     $ 1,350  
Schedule of assumptions to estimate the fair value of options
                                 
    Three Months Ended     Nine Months Ended  
    September 30,     September 30,  
    2022     2021     2022     2021  
Weighted-average risk-free interest rate     %     %     1.91 %     0.5 %
Expected dividend payments                        
Expected holding period (years) 1                 5.3       5.5  
Weighted-average volatility factor 2                 1.16       1.14  
Estimated forfeiture rates for options granted 3     %     %     5.6 %     30 %

 

 

(1) Expected holding period is based on historical experience of similar awards, giving consideration to the contractual terms of the stock-based awards, vesting schedules and the expectations of future employee behavior.
(2) Weighted average volatility is based on the historical volatility of our common stock.
(3) Estimated forfeiture rates are based on historical data.