Annual report pursuant to Section 13 and 15(d)

Note 15 - Stock-based Compensation (Tables)

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Note 15 - Stock-based Compensation (Tables)
12 Months Ended
Dec. 31, 2023
Notes Tables  
Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block]
   

Awards Reserved for Issuance

   

Awards Exercised

   

Awards Outstanding

   

Awards Available for Grant

 
                                 

2016 Equity Incentive Plan

    2,000,000             2,489       1,997,511  

2018 Equity Incentive Plan

    43,976,425       40,221       245,871       43,690,333  

2019 Equity Incentive Plan

    55,000,000       349       119,992       54,879,659  
Share-Based Payment Arrangement, Cost by Plan [Table Text Block]
    (in thousands, except for shares / options) For the Year Ended  
   

December 31, 2023

   

December 31, 2022

 

Type of Award

 

Number of Shares or Options Granted

   

Stock-Based Compensation Expense

   

Number of Shares or Options Granted

   

Stock- Based Compensation Expense

 
                                 

Stock Options

    192,442     $ 525       10,750     $ 3,659  
                                 

Stock Grants:

                               

Employees (Common Stock)

                21,000       352  

Directors (Common Stock)

                9,431       213  

Non–Employee Consultants (Common Stock)

    1,721,186       1,910       169,062       695  

Total Stock–Based Compensation Expense

          $ 2,435             $ 4,919  
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
   

Number of Shares

   

Weighted-Average Exercise Price Per Share

   

Weighted-Average Remaining Contractual Life (in Years)

   

Aggregate Intrinsic Value of In-the-Money Options

 

Options Outstanding as of December 31, 2021

    882,514     $ 41.00                  

Granted

    10,750     $ 23.00                  

Exercised

    (1,462 )   $ 8.00                  

Forfeited

    (193,651 )   $ 15.00                  

Expired

    (169,940 )   $ 41.00                  

Options Outstanding as of December 31, 2022

    528,211     $ 20.00                  

Granted

    192,442     $ 1.00                  

Forfeited

    (351,352 )   $ 22.00                  

Options Outstanding as of December 31, 2023

    369,301     $ 13.00       8.3 years     $  

Options Exercisable as of December 31, 2023

    351,806     $ 13.00       8.3 years     $ 161  
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
   

Year Ended December 31,

 
   

2023

   

2022

 

Expected Term (in Years)

    5.0       5.2  

Volatility

    121.2 %     103.0 %

Risk-Free Interest Rate

    4.8 %     0.9 %

Dividend Yield

    0 %     0 %