Annual report pursuant to Section 13 and 15(d)

Note 14 - Share-based Compensation - Stock Options Outstanding (Details)

v3.20.1
Note 14 - Share-based Compensation - Stock Options Outstanding (Details)
 12 Months Ended
Dec. 31, 2019
$ / shares
shares
Outstanding, shares (in shares) | shares 1,220,359
Outstanding, weighted average remaining contractual life (Year) 8 years 73 days
Outstanding, weighted average exercise price (in dollars per share) $ 5.33
Exercisable, shares (in shares) | shares 641,613
Exercisable, weighted average remaining contractual life (Year) 7 years 109 days
Exercise Price Range 1 [Member]  
Per share exercise price, lower range (in dollars per share) $ 2
Per share exercise price, upper range (in dollars per share) $ 2.99
Outstanding, shares (in shares) | shares 132,900
Outstanding, weighted average remaining contractual life (Year) 6 years
Outstanding, weighted average exercise price (in dollars per share) $ 2.29
Exercisable, shares (in shares) | shares 132,483
Exercisable, weighted average remaining contractual life (Year) 6 years
Exercise Price Range 2 [Member]  
Per share exercise price, lower range (in dollars per share) $ 3
Per share exercise price, upper range (in dollars per share) $ 3.99
Outstanding, shares (in shares) | shares 120,822
Outstanding, weighted average remaining contractual life (Year) 7 years
Outstanding, weighted average exercise price (in dollars per share) $ 3.90
Exercisable, shares (in shares) | shares 120,822
Exercisable, weighted average remaining contractual life (Year) 7 years
Exercise Price Range 3 [Member]  
Per share exercise price, lower range (in dollars per share) $ 4
Per share exercise price, upper range (in dollars per share) $ 4.99
Outstanding, shares (in shares) | shares 746,407
Outstanding, weighted average remaining contractual life (Year) 9 years 73 days
Outstanding, weighted average exercise price (in dollars per share) $ 4.55
Exercisable, shares (in shares) | shares 248,403
Exercisable, weighted average remaining contractual life (Year) 8 years 292 days
Exercise Price Range 4 [Member]  
Per share exercise price, lower range (in dollars per share) $ 5
Per share exercise price, upper range (in dollars per share) $ 10
Outstanding, shares (in shares) | shares 170,080
Outstanding, weighted average remaining contractual life (Year) 8 years 146 days
Outstanding, weighted average exercise price (in dollars per share) $ 8.33
Exercisable, shares (in shares) | shares 89,755
Exercisable, weighted average remaining contractual life (Year) 8 years 146 days
Exercise Price Range 5 [Member]  
Per share exercise price, lower range (in dollars per share) $ 10.01
Per share exercise price, upper range (in dollars per share) $ 34
Outstanding, shares (in shares) | shares 50,150
Outstanding, weighted average remaining contractual life (Year) 2 years 328 days
Outstanding, weighted average exercise price (in dollars per share) $ 18.22
Exercisable, shares (in shares) | shares 50,150
Exercisable, weighted average remaining contractual life (Year) 2 years 328 days