STOCK OPTION AGREEMENTS AND TRANSACTIONS (Tables)

12 Months Ended

Dec. 31, 2022

STOCK AND STOCK OPTION PLANS

Stock option valuation assumptions

	2022			2021
Risk free interest rate	1.26% to 3.35%			0.16% to 0.64%
Expected dividend yield		0	%		0	%
Expected stock price volatility	110% to 130%			100% to 140%
Expected life of options	2.75 years			1.25 to 5.25 years

Stock option activity

	Number of			Weighted		Remaining	Aggregate
	Options			Average		Contractual	Intrinsic
	Outstanding			Exercise Price		Term	Value
Outstanding at December 31, 2020		165,768		$	3.98
Granted		23,429		$	15.98
Exercised		(31,858	)	$	2.78
Expired		(600	)	$	7.13
Forfeited		(13,312	)	$	7.20
Outstanding at December 31, 2021		143,427		$	5.85	2.8 years		289,700
Granted		1,403		$	9.48
Exercised		(5,668	)	$	3.00
Expired		(7,373	)	$	4.87
Outstanding at December 31, 2022		131,789		$	6.05
Vested or expected to vest at December 31, 2022		131,789		$	6.05	2.8 years		289,700
Exercisable at December 31, 2022		131,655		$	6.04	2.8 years		289,700