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Stock-based Compensation (Details Textual) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Stock Based Compensation (Textual) [Abstract] |  |  |
Number of Common Stock outstanding | 315,356 |  |
Number of Common Stock outstanding | 2,660,315 | 2,030,500 |
Increase in maximum number of shares issuable | 54,387 |  |
Number of shares outstanding under Equity plan | 67,630 |  |
Shares reserved for future | 80,255 |  |
Percentage holding for stock options exercise price | 10.00% |  |
Number of shares outstanding under Non-Employee Director Stock Option Plan | 144,019 | 144,039 | 158,873
Options granted to purchase common stock | 5,833 | 27,450 |
Total intrinsic value of options exercised | $ 0 | $ 1,000 |
Unrecognized compensation expense related to unvested options | $ 150,000 |  |
Maturity period of weighted average period of compensation expenses | 10 months 24 days |  |
2004 Stock Option Plan [Member] |  |  |
Stock Based Compensation (Textual) [Abstract] |  |  |
Number of Common Stock outstanding | 76,305 |  |
Warrant price per share | 14.04 |  |
Non-Employee Director Stock Option Plan [Member] |  |  |
Stock Based Compensation (Textual) [Abstract] |  |  |
Number of shares outstanding under Non-Employee Director Stock Option Plan | 83 |  |
Maximum [Member] |  |  |
Stock Based Compensation (Textual) [Abstract] |  |  |
Percentage of exercise price of stock option | 110.00% |  |
Minimum [Member] |  |  |
Stock Based Compensation (Textual) [Abstract] |  |  |
Percentage of exercise price of stock option | 100.00% |  |

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