Quarterly report pursuant to Section 13 or 15(d)

Note 13 - Share-based Compensation - Stock Option Activity (Details)

v3.19.2
Note 13 - Share-based Compensation - Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Exercised (in shares)   (16,954)  
Share-based Payment Arrangement, Option [Member]      
Balance (in shares) 639,359    
Granted (in shares) 670,825    
Exercised (in shares) (50,000)    
Expired/cancelled (in shares) (7,186)    
Forfeited (in shares) (3,439)    
Balance (in shares) 1,249,559    
Balance, weighted average exercise price (in dollars per share) $ 5.90    
Granted, weighted average exercise price (in dollars per share) 4.56    
Exercised, weighted average exercise price (in dollars per share) 1.50    
Expired / cancelled, weighted average exercise price (in dollars per share) 5.37    
Forfeited, weighted average exercise price (in dollars per share) 6.65    
Balances, weighted average exercise price (in dollars per share) $ 5.41    
Balance, aggregate intrinsic value $ 460