Quarterly report pursuant to Section 13 or 15(d)

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

v3.22.2.2
Note 12 - Share-based Compensation - Stock Options Outstanding (Details)
 9 Months Ended
Sep. 30, 2022
$ / shares
shares
Outstanding, shares (in shares) | shares 2,775,998
Outstanding, weighted average remaining contractual life (Year) 7 years 7 months 6 days
Outstanding, weighted average exercise price (in dollars per share) $ 4.15
Exercisable, shares (in shares) | shares 1,464,492
Exercisable, weighted average remaining contractual life (Year) 6 years 2 months 12 days
Exercise Price Range 1 [Member]  
Per share exercise price, lower range (in dollars per share) $ 1.00
Share-Based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit (in dollars per share) $ 1.99
Outstanding, shares (in shares) | shares 152,000
Outstanding, weighted average remaining contractual life (Year) 9 years 10 months 24 days
Outstanding, weighted average exercise price (in dollars per share) $ 1.50
Exercise Price Range 2 [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 3 months 18 days
Outstanding, weighted average exercise price (in dollars per share) $ 2.50
Exercisable, shares (in shares) | shares 170,852
Exercisable, weighted average remaining contractual life (Year) 4 years 8 months 12 days
Exercise Price Range 3 [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 409,393
Outstanding, weighted average remaining contractual life (Year) 7 years 6 months
Outstanding, weighted average exercise price (in dollars per share) $ 3.80
Exercisable, shares (in shares) | shares 193,766
Exercisable, weighted average remaining contractual life (Year) 5 years 9 months 18 days
Exercise Price Range 4 [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 862,182
Outstanding, weighted average remaining contractual life (Year) 6 years 8 months 12 days
Outstanding, weighted average exercise price (in dollars per share) $ 4.57
Exercisable, shares (in shares) | shares 805,349
Exercisable, weighted average remaining contractual life (Year) 6 years 7 months 6 days
Exercise Price Range 5 [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) $ 24.00
Outstanding, shares (in shares) | shares 552,025
Outstanding, weighted average remaining contractual life (Year) 7 years 4 months 24 days
Outstanding, weighted average exercise price (in dollars per share) $ 6.85
Exercisable, shares (in shares) | shares 294,525
Exercisable, weighted average remaining contractual life (Year) 6 years 2 months 12 days