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NOTE 6 — Stock-Based Compensation Plan (Tables) | 12 Months Ended
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Dec. 31, 2021
Share-based Payment Arrangement [Abstract] |
Schedule of employee service stock-based compensation, allocation of recognized period costs |
|  | Years Ended December 31,
Income Statement Classification |  | 2021 |  | 2020
Cost of revenues |  | $ | 96,254 |  |  | $ | 86,649 |
Research and development |  |  | 218,559 |  |  |  | 137,537 |
Sales and marketing |  |  | 166,266 |  |  |  | 121,802 |
General and administrative |  |  | 212,346 |  |  |  | 161,063 |
Stock-based compensation expenses |  | $ | 693,425 |  |  | $ | 507,051 |
Stock options' weighted average assumptions and grant date fair values |
|  | Years Ended December 31,
|  | 2021 |  | 2020
Risk-free interest rate (%) |  |  | 1.64 | % |  |  | 0.68 | %
Dividend yield |  |  | — |  |  |  | — |
Volatility factor |  |  | 102.26 | % |  |  | 43.62 | %
Expected option life (years) |  |  | 3.9 |  |  |  | 7.4 |
Activity of stock options exercised |
|  | Years Ended December 31,
|  | 2021 |  | 2020
Total intrinsic value of stock options exercised |  | $ | 9,985,639 |  |  | $ | 167,882 |
Cash received from stock option exercises |  | $ | 1,899,561 |  |  | $ | 168,065 |
2004 Plan outstanding and exercisable options by price range |
|  |  |  | Options Outstanding |  |  |  |  | Options Exercisable
| Range of Exercise Prices |  |  | Number of Options Outstanding |  |  |  | Weighted Average Remaining Life (Years) |  |  |  | Weighted Average Exercise Price |  |  |  | Number of Options Exercisable |  |  |  | Weighted Average Exercise Price |
| $0.95. - $1.25 |  |  | 226,438 |  |  |  | 2.67 |  |  | $ | 1.07 |  |  |  | 218,730 |  |  | $ | 1.07 |
| $1.50 - $1.90 |  |  | 217,825 |  |  |  | 5.50 |  |  | $ | 1.84 |  |  |  | 169,826 |  |  | $ | 1.84 |
| $2.00 - $2.32 |  |  | 359,196 |  |  |  | 6.50 |  |  | $ | 2.29 |  |  |  | 246,921 |  |  | $ | 2.28 |
| $2.36 - $2.75 |  |  | 149,475 |  |  |  | 5.08 |  |  | $ | 2.61 |  |  |  | 145,725 |  |  | $ | 2.61 |
| $2.92 - $2.93 |  |  | 116,824 |  |  |  | 6.25 |  |  | $ | 2.93 |  |  |  | 101,650 |  |  | $ | 2.93 |
| $3.70 - $4.49 |  |  | 126,365 |  |  |  | 5.25 |  |  | $ | 4.08 |  |  |  | 126,365 |  |  | $ | 4.08 |
| $5.00 - $8.58 |  |  | 182,000 |  |  |  | 9.92 |  |  | $ | 6.39 |  |  |  | 18,292 |  |  | $ | 6.47 |
| $0.95 - $8.58 |  |  | 1,378,123 |  |  |  | 4.50 |  |  | $ | 2.81 |  |  |  | 1,027,509 |  |  | $ | 2.36 |
Restricted Stock |
| Number of Restricted Stocks |  | Weighted Average Price Per Share
Unvested as of December 31, 2019 |  |  | 110,071 |  |  | $ | 1.94 |
Granted |  |  | 392,680 |  |  | $ | 1.50 |
Vested |  |  | (17,306 | ) |  | $ | 1.94 |
Forfeited |  |  | (43,245 | ) |  | $ | 1.65 |
Unvested as of December 31, 2020 |  |  | 442,200 |  |  | $ | 1.58 |
Granted |  |  | 312,112 |  |  | $ | 2.89 |
Vested |  |  | (59,659 | ) |  | $ | 1.65 |
Forfeited |  |  | (48,528 | ) |  | $ | 2.00 |
Unvested as December 31, 2021 |  |  | 646,125 |  |  | $ | 3.32 |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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