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Stock-Based Compensation (Details Textual) - USD ($) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Aug. 31, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Stock-Based Compensation (Textual) |  |  |  |  |
Share-based compensation expense |  | $ 255,000 | $ 1,075,000 | $ 1,729,000 |
Weighted average grant date fair value |  | $ 0.67 | $ 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 |  | 25,000 | 515,000 | 395,200 |
Stock based compensation options granted to purchase of common stock to employee fair value |  | $ 17,000 | $ 800,000 | $ 1,300,000 |
Exercise price of the warrants |  | $ 1.12 |  |  |
Proceeds from exercise of warrants |  |  |  | 36,000 |
Term of stock options description |  | Options granted under the Director Plan vest over a one to four-year period, expire five to seven years after the date of grant and have exercise prices reflecting market value of the shares of our common stock on the date of grant. Stock options granted under the 2006 and 2015 Plans are exercisable over a maximum term of ten years from the date of grant, vest in various installments over a one to four-year period and have exercise prices reflecting the market value of the shares of common stock on the date of grant. |  |  |
Private Placement [Member] |  |  |  |  |
Stock-Based Compensation (Textual) |  |  |  |  |
Exercise price of the warrants | $ 0.99 |  |  |  |
Swedish employees [Member] |  |  |  |  |
Stock-Based Compensation (Textual) |  |  |  |  |
Number of shares, options granted |  |  | 265,000 |  |
Stock Options [Member] |  |  |  |  |
Stock-Based Compensation (Textual) |  |  |  |  |
Share-based compensation expense |  | $ 300,000 | $ 1,100,000 | $ 1,700,000 |
Weighted average grant date fair value |  | $ 4.43 |  |  |
Vesting period |  | 1 year 1 month 6 days |  |  |
Number of options outstanding |  | 1,846,000 | 2,184,117 | 1,709,400 | 1,600,583
Number of shares, options granted |  | 25,000 | 605,000 | 405,200 |
2015 Plan [Member] | Stock Options [Member] |  |  |  |  |
Stock-Based Compensation (Textual) |  |  |  |  |
Number of shares, options granted |  | 25,000 |  |  |
Aggregate shares of common stock, shares |  |  | 2,100,000 |  |
Warrant [Member] |  |  |  |  |
Stock-Based Compensation (Textual) |  |  |  |  |
Vesting period |  | 1 year 1 month 6 days |  |  |
Common stock issuable upon exercise of warrants |  | 11,565 |  | 10,053 |
Number of options outstanding |  | 7,913,676 | 464,073 | 3,335,073 | 828,573
Number of shares, options granted |  | 3,600,000 |  |  |

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- Definition Exercise price of the warrants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column A + Details
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