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Equity (Tables) | 12 Months Ended
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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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