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Stock-Based Compensation (Details 4) - $ / shares | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Summary of all stock option plans |  |  |  |
Number of Shares/Warrants, Options Outstanding, Beginning Balance | 1,709,400 |  |  |
Number of Shares/Warrants, Options Outstanding, Ending Balance |  | 1,709,400 |  |
Warrant [Member] |  |  |  |
Summary of all stock option plans |  |  |  |
Number of Shares/Warrants, Options Outstanding, Beginning Balance | 3,335,073 | 828,573 | 4,704,636 | 5,405,606
Warrants, Issued |  | 2,575,000 |  |
Warrants, Expired/cancelled | (2,591,000) | (40,000) |  |
Number of Shares, Options Exercised | (280,000) | (28,500) | (3,876,063) |
Number of Shares/Warrants, Options Outstanding, Ending Balance | 464,073 | 3,335,073 | 828,573 | 4,704,636
Weighted Average Exercise Price, Options Outstanding, Beginning Balance | $ 4.45 | $ 2.39 | $ 1.61 |
Weighted Average Exercise Price, Granted |  | 5.09 |  |
Weighted Average Exercise Price,Options Cancelled or expired | $ 5.06 | 3.98 |  |
Weighted Average Exercise Price, Options Exercised | 1.30 | 2.85 | $ 1.45 |
Weighted Average Exercise Price, Options Outstanding, Ending Balance | $ 3.02 | $ 4.45 | $ 2.39 | $ 1.61
Weighted Average Remaining Contractual Life, Outstanding and exercisable | 2 months 9 days | 11 months 5 days | 2 years 22 days | 1 year 4 months 28 days

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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price of options that were either forfeited or expired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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=6415400&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://www.xbrl.org/2003/role/presentationRef -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=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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