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Stock Options and Warrants (Details Textual) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Jul. 31, 2017
Stock Options and Warrants (Textual) |  |  |
Stock compensation expense | $ 378,000 | $ 293,000 |
Unrecognized compensation cost related to non-vested stock option awards | 28,000 |  |
Unrecognized compensation cost related to non-vested stock option awards, period |  | 1 year 3 months 19 days |
Fair value of shares vested | 1,210,000 | $ 224,718 |
Additional Paid-In Capital |  |  |
Stock Options and Warrants (Textual) |  |  |
Stock compensation expense | $ 378,000 | $ 293,000 |
Warrant [Member] |  |  |
Stock Options and Warrants (Textual) |  |  |
Granted during the period, options |  | 535,600 |
Weighted average exercise price | $ 2.90 | $ 3.10 |
Weighted-average grant date fair value per share | $ 1.24 | $ 1.24 |
Warrant outstanding | 2,182,902 | 2,239,702 |
Risk free interest rate | 2.33% | 2.69% |
Expected volatility factor | 116.00% | 66.00% |
Expected dividend yield | 0.00% | 0.00% |
Estimated option term | 4 years 10 months 25 days | 4 years 10 months 25 days |
Warrants issued in connection with convertible notes payable and common stock issuances | 0 | 535,600 |
Stock option [Member] |  |  |
Stock Options and Warrants (Textual) |  |  |
Plan authorized |  |  | 1,200,000
Granted during the period, options | 613,000 | 88,000 |
Intrinsic value | $ 1,300,000 |  |
Weighted-average grant date fair value per share | $ 0.50 | $ 0.72 |
Exercisable in-the-money | 1,206,000 |  |
Risk free interest rate |  | 2.69% |
Risk free interest rate, minimum | 1.87% |  |
Risk free interest rate, maximum | 2.60% |  |
Expected volatility factor |  | 66.00% |
Expected volatility factor, minimum | 65.80% |  |
Expected volatility factor, maximum | 72.40% |  |
Expected dividend yield | 0.00% | 0.00% |
Estimated option term | 5 years | 5 years |

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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + 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 (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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