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Stock Based Compensation (Details Textual) - USD ($) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Apr. 04, 2013 | Dec. 31, 2011 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Stock-Based Compensation (Textual) |  |  |  |  |  |
Share-based compensation expense |  |  | $ 1,075,000 | $ 1,729,000 | $ 2,656,000 |
Weighted average grant date fair value |  |  | $ 1.24 | $ 3.14 |  |
Options granted to purchase of common stock to employee |  |  | 90,000 | 10,000 |  |
Options granted to purchase of common stock to board members |  |  | 515,000 | 395,200 | 145,000 |
Stock based compensation options granted to purchase of common stock to employee fair value |  |  | $ 800,000 | $ 1,300,000 | $ 748,000 |
Stock options vesting period description |  |  |  |  | The options have a 7-year life and 1/3 of the options are vested on the one year anniversary date of grant with the remaining to vest monthly over the next 24-months. |
Estimated fair value of the warrants | $ 166,000 |  |  |  |  |
Number of Options Outstanding |  |  |  | 1,709,400 |  |
Stock Options [Member] |  |  |  |  |  |
Stock-Based Compensation (Textual) |  |  |  |  |  |
Share-based compensation expense |  |  | $ 1,100,000 | $ 1,700,000 | $ 2,700,000 |
Weighted average grant date fair value |  |  | $ 4.63 |  |  |
Vesting period |  |  | 1 year 7 months 6 days |  |  |
Number of Options Outstanding |  |  | 2,184,117 | 1,709,400 | 1,600,583 | 1,715,200
Number of Shares, Options Granted |  |  | 605,000 | 405,200 | 145,000 |
Two thousand fifteen Plan [Member] | Stock Options [Member] |  |  |  |  |  |
Stock-Based Compensation (Textual) |  |  |  |  |  |
Number of Shares, Options Granted |  |  | 605,000 |  |  |
Aggregate shares of common stock, shares |  |  | 2,100,000 |  |  |
Warrant [Member] |  |  |  |  |  |
Stock-Based Compensation (Textual) |  |  |  |  |  |
Share-based compensation expense |  |  |  |  | $ 26,000 |
Vesting period |  | 24 months | 1 year 7 months 6 days |  |  |
Common stock issuable upon exercise of warrants |  | 20,000 |  | 10,053 | 1,384,719 |
Exercise price of warrants per share |  | $ 3.90 |  |  |  |
Estimated fair value of the warrants |  | $ 75,000 |  |  |  |
Number of Options Outstanding |  | 5,405,606 | 464,073 | 3,335,073 | 828,573 | 4,704,636
Number of Shares, Options Granted |  |  |  | 2,575,000 |  |

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- Definition Stock based compensation options granted to purchase of common stock to board members. + References No definition available. + Details
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- Definition Stock Options Vesting Period Description. + References No definition available. + Details
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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