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Equity (Tables)

12 Months Ended

Dec. 31, 2020

Summary of status of non-vested stock options

A summary of the status of the Company’s non-vested stock options at December 31 and changes during the year is as follows:

		2020					2019
				Weighted					Weighted
				Average					Average
		Number of		Grant Date			Number of		Grant Date
		Options		Fair Value			Options		Fair Value
Non-vested stock options at January 1		669,985		$	1.71		292,315		$	2.61
Granted		743,161		$	1.07		1,328,718		$	1.32
Vested		(1,077,655)		$	2.25		(902,268)		$	1.40
Exercised		—			—		—			—
Forfeited/Expired/Exchanged		(18,124)		$	2.41		(48,780)		$	2.14
Non-vested stock options at December 31		317,367		$	1.60		669,985		$	1.71

Schedule of unrecognized compensation cost

At December 31, 2020, there was $84,000 of total unrecognized compensation cost related to non-vested stock option-based compensation arrangements granted under the Plan that will be recognized over a remaining weighted average period of 0.7 years. That cost is expected to be recognized in future years as follows:

2021			76,000
2022			8,000
		$	84,000

Schedule of recognized compensation cost

The recognized compensation cost associated with the Plan is as follows:

		2020			2019
Research and development		$	83,000		$	174,000
General and administrative			665,000			394,000
Effect on net loss		$	748,000		$	568,000
Effect on net loss per share		$	0.03		$	0.02

Equity Incentive Plan [Member]

Schedule of share-based compensation activity

Activity under the Plan is as follows:

		2020		2019
Reserved but unissued shares under the Plan, beginning of year		1,282,027		1,296,462
Increases in the number of authorized shares under the Plan		500,764		1,236,346
Grants of stock options		(743,161)		(1,328,718)
Stock option forfeitures		60,100		77,937
Exercise of stock options		117,000		—
Reserved but unissued shares under the Plan, end of year		1,216,730		1,282,027

Warrant [Member]

Schedule Of warrant activity

A summary of the Company’s warrant activity and related information is as follows:

		2020					2019
				Weighted					Weighted
				Average					Average
				Exercise					Exercise
		Warrants		Price			Warrants		Price
Outstanding at January 1		80,000		$	1.80		2,495,784		$	3.98
Granted		—			—		—			—
Exercised		—			—		—			—
Forfeited/Expired		—			—		(2,415,784)		$	4.05
Outstanding at December 31		80,000		$	1.80		80,000		$	1.80

Summary of warrants outstanding

The following table summarizes the number of warrants, the weighted average exercise price, and weighted average life (in years) by price for both total outstanding warrants and total exercisable warrants at December 31,2020:

		Total Outstanding Warrants
				Wtd. Avg.			Remaining
				Exercise			Life
Exercise Price		Warrants		Price			(in years)
$1.80		80,000		$	1.80		0.13

Stock Options [Member]

Schedule of weighted-average assumptions used in calculation of fair value of stock options

The following weighted-average assumptions were utilized in the calculation of the fair value of the stock options:

		2020		2019
Expected life		10.00 years		5.75 years
Weighted average volatility		83	%	71	%
Forfeiture rate		0	%	20	%
Weighted average risk-free interest rate		0.71	%	2.52	%
Expected dividend rate		0	%	0	%

Schedule of stock option activity

A summary of the Company’s stock option activity and related information is as follows:

		2020							2019
							Weighted							Weighted
							Average							Average
		Options to		Weighted			Remaining		Options to		Weighted			Remaining
		Purchase		Average			Contractual		Purchase		Average			Contractual
		Common		Exercise			Life (in		Common		Exercise			Life (in
		Stock		Price			years)		Stock		Price			years)
Outstanding at January 1		2,131,058		$	2.53		7.99		880,277		$	4.32		6.49
Granted		743,161		$	1.07		9.23		1,328,718		$	1.32		9.16
Exercised		(117,000)		$	1.08		—		—			—		—
Forfeited/Expired/Exchanged		(60,100)		$	2.88		—		(77,937)		$	2.11		—
Outstanding at December 31		2,697,119		$	2.18		7.53		2,131,058		$	2.53		7.99
Exercisable at December 31		2,379,752		$	2.26		7.48		1,461,073		$	2.90		7.58

Non-vested stock options

Schedule of weighted-average assumptions used in calculation of fair value of stock options

The following weighted-average assumptions were utilized in the calculation of the fair value of the stock options:

		2019
Expected life		5.75	years
Weighted average volatility		71	%
Forfeiture rate		20	%
Weighted average risk-free interest rate		2.55	%
Expected dividend rate		0	%

Consultant Plan [Member]

Schedule of share-based compensation activity

		2020		2019
Reserved but unissued shares under the Consultant Plan at January 1		190,142		199,705
Increases in the number of authorized shares under the Consultant Plan		33,384		437
Stock grants		(11,250)		(10,000)
Reserved but unissued shares under the Consultant Plan at Period End		212,276		190,142

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