Note 4 - Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2022

	Nine Months Ended September 30, 2022
	Number of Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in years)		Aggregate Intrinsic Value
Outstanding, January 1, 2022		919,790		$	5.67		6.5	$	—
Granted		12,500			0.83
Cancelled/Forfeited		(152,455	)		2.38
Expired		(73,755	)		22.96
Outstanding, September 30, 2022		706,080		$	4.48		5.7	$	—
Exercisable, September 30, 2022		532,749		$	5.45		4.7	$	—

	Nine Months Ended September 30, 2022
	Number of Shares			Weighted Average Grant-Date Fair Value
Unvested, January 1, 2022		95,000		$	1.40
Vested		(5,000	)		1.96
Unvested, September 30, 2022		90,000		$	1.37