Annual report pursuant to Section 13 and 15(d)

Note 5 - Stock Incentive Plan - Options Outstanding (Details)

v3.24.1
Note 5 - Stock Incentive Plan - Options Outstanding (Details)
 12 Months Ended
Dec. 31, 2023
$ / shares
shares
Number of shares subject to options outstanding (in shares) 2,109,001
Weighted-average remaining contractual term (Year) 6 years 5 months 23 days
Number of shares, exercisable (in shares) 1,507,255
Weighted-average remaining contractual term, exercisable (Year) 5 years 7 months 20 days
Price Range 1 [Member]  
Lower exercise price (in dollars per share) | $ / shares $ 0.001
Upper exercise price (in dollars per share) | $ / shares $ 5
Number of shares subject to options outstanding (in shares) 1,371,895
Weighted-average remaining contractual term (Year) 6 years 11 months 12 days
Number of shares, exercisable (in shares) 832,423
Weighted-average remaining contractual term, exercisable (Year) 5 years 9 months 18 days
Price Range 2 [Member]  
Lower exercise price (in dollars per share) | $ / shares $ 5.01
Upper exercise price (in dollars per share) | $ / shares $ 10
Number of shares subject to options outstanding (in shares) 617,942
Weighted-average remaining contractual term (Year) 5 years 6 months
Number of shares, exercisable (in shares) 555,668
Weighted-average remaining contractual term, exercisable (Year) 5 years 3 months 18 days
Price Range 3 [Member]  
Lower exercise price (in dollars per share) | $ / shares $ 10.01
Upper exercise price (in dollars per share) | $ / shares $ 15
Number of shares subject to options outstanding (in shares) 113,039
Weighted-average remaining contractual term (Year) 6 years 1 month 2 days
Number of shares, exercisable (in shares) 113,039
Weighted-average remaining contractual term, exercisable (Year) 6 years 1 month 2 days
Price Range 4 [Member]  
Lower exercise price (in dollars per share) | $ / shares $ 15.01
Upper exercise price (in dollars per share) | $ / shares $ 20
Number of shares subject to options outstanding (in shares) 6,125
Weighted-average remaining contractual term (Year) 6 years 1 month 2 days
Number of shares, exercisable (in shares) 6,125
Weighted-average remaining contractual term, exercisable (Year) 6 years 1 month 2 days