Stock Option Plans and Agreements (Tables)

6 Months Ended

Jun. 30, 2023

Stock Option Plans and Agreements

Stock option valuation assumptions

Risk-free interest rate	3.57% - 3.98		%
Expected dividend yield		0	%
Expected stock price volatility		110	%
Expected life of options (years)		2.75

Stock option activity

	Number of			Weighted		Remaining	Aggregate
	Options			Average		Contractual	Intrinsic
	Outstanding			Exercise Price		Term	Value
Outstanding at December 31, 2022		131,789		$	6.03
Granted		47,600			1.20
Expired		(6,335	)		3.85
Outstanding at June 30, 2023		173,054		$	5.14	2.9 years	$	0.00
At June 30, 2023- vested or
expected to vest		158,054		$	5.14	2.7 years	$	0.00
Exercisable		158,054		$	5.14	2.7 years	$	0.00