Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Share-based Compensation - Stock Option Activity (Details)

v3.21.2
Note 11 - Share-based Compensation - Stock Option Activity (Details) - USD ($)
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Exercised (in shares) (40,000) (7,200)  
Exercised, aggregate intrinsic value $ 132,000 $ 22,000  
Share-based Payment Arrangement, Option [Member]      
Balance (in shares) 1,389,568    
Balance, weighted average exercise price (in dollars per share) $ 5.35    
Balance, aggregate intrinsic value $ 252,000   $ 7,109,000
Granted (in shares) 623,008    
Granted, weighted average exercise price (in dollars per share) $ 5.21    
Exercised (in shares) (40,000)    
Exercised, weighted average exercise price (in dollars per share) $ 6.09    
Exercised, aggregate intrinsic value $ 132,000    
Expired/cancelled (in shares) (8,476)    
Expired / cancelled, weighted average exercise price (in dollars per share) $ 4.44    
Forfeited (in shares) (5,000)    
Forfeited, weighted average exercise price (in dollars per share) $ 10.04    
Balance (in shares) 1,959,100    
Balance, weighted average exercise price (in dollars per share) $ 5.28