Quarterly report pursuant to Section 13 or 15(d)

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

v3.23.1
Note 12 - Share-based Compensation - Stock Options Outstanding (Details)
 3 Months Ended
Mar. 31, 2023
$ / shares
shares
Outstanding, shares (in shares) | shares 2,773,498
Outstanding, weighted average remaining contractual life (Year) 7 years 1 month 6 days
Outstanding, weighted average exercise price (in dollars per share) $ 4.10
Exercisable, shares (in shares) | shares 1,709,793
Exercisable, weighted average remaining contractual life (Year) 6 years
Exercise Price Range 1 [Member]  
Per share exercise price, lower range (in dollars per share) $ 1.00
Per share exercise price, upper range (in dollars per share) $ 1.99
Outstanding, shares (in shares) | shares 177,000
Outstanding, weighted average remaining contractual life (Year) 9 years 6 months
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
Per share exercise price, upper range (in dollars per share) $ 2.99
Outstanding, shares (in shares) | shares 790,398
Outstanding, weighted average remaining contractual life (Year) 7 years 8 months 12 days
Outstanding, weighted average exercise price (in dollars per share) $ 2.51
Exercisable, shares (in shares) | shares 283,711
Exercisable, weighted average remaining contractual life (Year) 5 years 6 months
Exercise Price Range 3 [Member]  
Per share exercise price, lower range (in dollars per share) $ 3.00
Per share exercise price, upper range (in dollars per share) $ 3.99
Outstanding, shares (in shares) | shares 409,393
Outstanding, weighted average remaining contractual life (Year) 6 years 9 months 18 days
Outstanding, weighted average exercise price (in dollars per share) $ 3.82
Exercisable, shares (in shares) | shares 259,918
Exercisable, weighted average remaining contractual life (Year) 5 years 8 months 12 days
Exercise Price Range 4 [Member]  
Per share exercise price, lower range (in dollars per share) $ 4.00
Per share exercise price, upper range (in dollars per share) $ 4.99
Outstanding, shares (in shares) | shares 862,182
Outstanding, weighted average remaining contractual life (Year) 6 years 3 months 18 days
Outstanding, weighted average exercise price (in dollars per share) $ 4.58
Exercisable, shares (in shares) | shares 836,014
Exercisable, weighted average remaining contractual life (Year) 6 years 2 months 12 days
Exercise Price Range 5 [Member]  
Per share exercise price, lower range (in dollars per share) $ 5.00
Per share exercise price, upper range (in dollars per share) $ 16.00
Outstanding, shares (in shares) | shares 534,525
Outstanding, weighted average remaining contractual life (Year) 6 years 10 months 24 days
Outstanding, weighted average exercise price (in dollars per share) $ 6.74
Exercisable, shares (in shares) | shares 330,150
Exercisable, weighted average remaining contractual life (Year) 6 years 1 month 6 days