Annual report pursuant to Section 13 and 15(d)

Note 12 - Share-based Compensation - Stock Option Activity (Details)

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Note 12 - Share-based Compensation - Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Granted (in shares) 302,332    
Exercised (in shares) (14,283)    
Share-based Payment Arrangement, Option [Member]      
Balance (in shares) 1,220,359 639,359  
Balance, weighted average exercise price (in dollars per share) $ 5.33 $ 6.07  
Balance, aggregate intrinsic value $ 7,109 $ 678
Granted (in shares) 302,332 725,825  
Granted, weighted average exercise price (in dollars per share) $ 4.73 $ 4.52  
Exercised (in shares) (14,283) (50,000)  
Exercised, weighted average exercise price (in dollars per share) $ 3.21 $ 1.50  
Expired/cancelled (in shares) (78,147) (7,353)  
Expired / cancelled, weighted average exercise price (in dollars per share) $ 5.29 $ 5.49  
Forfeited (in shares) (40,697) (87,472)  
Forfeited, weighted average exercise price (in dollars per share) $ 4.86 $ 5.22  
Balance (in shares) 1,389,564 1,220,359  
Balance, weighted average exercise price (in dollars per share) $ 5.24 $ 5.33