Quarterly report pursuant to Section 13 or 15(d)

Note 12 - Share-based Compensation - Stock Options Outstanding (Details)

v3.22.2
Note 12 - Share-based Compensation - Stock Options Outstanding (Details)
 6 Months Ended
Jun. 30, 2022
$ / shares
shares
Outstanding, shares (in shares) | shares 2,623,998
Outstanding, weighted average remaining contractual life (Year) 7 years 9 months 18 days
Outstanding, weighted average exercise price (in dollars per share) $ 4.37
Exercisable, shares (in shares) | shares 1,358,459
Exercisable, weighted average remaining contractual life (Year) 6 years 3 months 18 days
Exercise Price Range 1 [Member]  
Per share exercise price, lower range (in dollars per share) $ 2.00
Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit (in dollars per share) $ 2.99
Outstanding, shares (in shares) | shares 800,398
Outstanding, weighted average remaining contractual life (Year) 8 years 7 months 6 days
Outstanding, weighted average exercise price (in dollars per share) $ 2.53
Exercisable, shares (in shares) | shares 133,000
Exercisable, weighted average remaining contractual life (Year) 4 years
Exercise Price Range 2 [Member]  
Per share exercise price, lower range (in dollars per share) $ 3.00
Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit (in dollars per share) $ 3.99
Outstanding, shares (in shares) | shares 328,008
Outstanding, weighted average remaining contractual life (Year) 8 years 7 months 6 days
Outstanding, weighted average exercise price (in dollars per share) $ 3.82
Exercisable, shares (in shares) | shares 85,472
Exercisable, weighted average remaining contractual life (Year) 6 years 10 months 24 days
Exercise Price Range 3 [Member]  
Per share exercise price, lower range (in dollars per share) $ 4.00
Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit (in dollars per share) $ 4.99
Outstanding, shares (in shares) | shares 943,567
Outstanding, weighted average remaining contractual life (Year) 6 years 9 months 18 days
Outstanding, weighted average exercise price (in dollars per share) $ 4.55
Exercisable, shares (in shares) | shares 871,399
Exercisable, weighted average remaining contractual life (Year) 6 years 8 months 12 days
Exercise Price Range 4 [Member]  
Per share exercise price, lower range (in dollars per share) $ 5.00
Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit (in dollars per share) $ 9.99
Outstanding, shares (in shares) | shares 512,025
Outstanding, weighted average remaining contractual life (Year) 8 years
Outstanding, weighted average exercise price (in dollars per share) $ 7.96
Exercisable, shares (in shares) | shares 237,338
Exercisable, weighted average remaining contractual life (Year) 6 years 8 months 12 days
Exercise Price Range 5 [Member]  
Per share exercise price, lower range (in dollars per share) $ 10.00
Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit (in dollars per share) $ 27.06
Outstanding, shares (in shares) | shares 40,000
Outstanding, weighted average remaining contractual life (Year) 4 years
Outstanding, weighted average exercise price (in dollars per share) $ 13.42
Exercisable, shares (in shares) | shares 31,250
Exercisable, weighted average remaining contractual life (Year) 2 years 8 months 12 days