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Stock Options and Warrants (Details 2) - Stock Option [Member] - $ / shares | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Summary of information about stock options outstanding |  |  |
Number Outstanding | 838,149 | 1,048,627 | 636,342
Weighted Average Exercise Price | $ 3.08 | $ 3.20 | $ 7.01
$0.00 - $5.00 [Member] |  |  |
Summary of information about stock options outstanding |  |  |
Range of Exercise Prices, Minimum | 0.00 |  |
Range of Exercise Prices, Maximum | $ 5.00 |  |
Number Outstanding | 646,000 |  |
Weighted Average Life | 5 years 2 months 12 days |  |
Weighted Average Exercise Price | $ 8.18 |  |
$5.01 - $20.00 [Member] |  |  |
Summary of information about stock options outstanding |  |  |
Range of Exercise Prices, Minimum | 5.01 |  |
Range of Exercise Prices, Maximum | $ 20.00 |  |
Number Outstanding | 192,149 |  |
Weighted Average Life | 1 year 7 months 6 days |  |
Weighted Average Exercise Price | $ 1.56 |  |
$0.00 - $20.00 [Member] |  |  |
Summary of information about stock options outstanding |  |  |
Range of Exercise Prices, Minimum | 0.00 |  |
Range of Exercise Prices, Maximum | $ 20.00 |  |
Number Outstanding | 838,149 |  |
Weighted Average Life | 4 years 4 months 24 days |  |
Weighted Average Exercise Price | $ 3.08 |  |

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- Definition Number of options outstanding, including both vested and non-vested options. + 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=109197908&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 (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance 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)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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