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Equity (Tables)

12 Months Ended

Dec. 31, 2022

Equity

Common Stock Purchase Warrant Transactions

		Number of Warrants				Exercise Prices
Balance December 31, 2020			426,788			$2.52-5.60
Issued			289,294			$5.60-7.00
Exercised			(46,615	)		$	2.52
Balance December 31, 2021			669,467			$2.52-7.00
Expired			(185,304	)		$2.52-5.60
Exercised			(194,869	)		$2.52-5.60
Balance December 31, 2022			289,294			$5.60-7.00

Warrant Expirations

Shares				Exercise Price				Expiration Date
	235,722			$	5.60			October 14, 2023
	53,572			$	7.00			November 12, 2023
	289,294

fair value of stock option awards granted

		February 11, 2021		March 15, 2021		October 20, 2021		September 6, 2022		September 28, 2022
Fair value		$604,572		$9,860		$473,143		$505,476		$41,799
Options issued		283,936		3,572		182,166		165,000		15,000
Exercise price		$5.60		$5.60		$5.60		$5.25		$4.75
Expected term (in years)		3.0		3.0		3.0		3.0		3.0
Risk-free rate		0.19%		0.33%		0.70%		3.55%		4.12%
Volatility		97.9%		99.3%		96.6%		89.3%		89.2%

Share-based Compensation, Stock Options, Activity

		Number of Options				Weighted Average Exercise Prices
Balance December 31, 2020			150,000			$	1.83
Granted			469,674			$	5.53
Exercised			(101,786	)		$	1.87
Forfeited			(10,713	)		$	5.60
Balance December 31, 2021			507,175			$	5.25
Granted			180,000			$	5.21
Exercised			(116,078	)		$	4.31
Expired			(7,143	)		$	1.96
Forfeited			(28,001	)		$	5.56
Balance December 31, 2022			535,953			$	5.47
Outstanding and exercisable at December 31, 2022			535,953			$	5.47

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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