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Note 6 - Share-based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

		Years Ended December 31,
		2023				2022
Risk-free interest rate			3.90% -5.12%				1.40% - 3.24%
Expected dividend yield			—%				—%
Expected stock price volatility			62.22% - 64.27%				61.30% - 61.58%
Expected life of options (in years)			1.13 -6.25				5.5 - 6.25

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

										Weighted-
										Average
						Weighted-				Remaining				Aggregate
						Average				Contractual				Intrinsic
		Shares				Exercise Price				Term (Years)				Value
Outstanding at December 31, 2021			4,774,215			$	3.04				6.14			$	8,413,444
Granted			865,825				4.43
Exercised			(333,943	)			1.63
Expired			(200,000	)			5.47
Canceled			(75,000	)			4.81
Outstanding at December 31, 2022			5,031,097			$	3.25				5.75			$	13,000
Granted (1)			805,350				1.45
Exercised			—				—
Expired (2)			(351,520	)			1.71
Canceled (3)			(15,680	)			3.50
Outstanding at December 31, 2023			5,469,247			$	3.08				5.66			$	322,738
Exercisable at December 31, 2023			4,160,298			$	3.15				4.81			$	161,427

Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

						Weighted-Average
						Grant Date
		Shares				Fair Value
Outstanding at December 31, 2022			—			$	—
Granted (1)			461,005				1.38
Vested (1)			(247,961	)			1.38
Outstanding at December 31, 2023			213,044			$	1.38

Share-Based Payment Arrangement, Activity [Table Text Block]

		Years Ended December 31,
		2023				2022
General and administrative		$	1,201,027			$	1,661,025
Research and development			43,094				227,919
Total		$	1,244,121			$	1,888,944

		Years Ended December 31,
		2023				2022
Share based compensation expense- stock options		$	1,004,054			$	1,888,944
Share based compensation expense- restricted stock units			240,067				—
Total		$	1,244,121			$	1,888,944

X

- Definition

Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value.

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