Stockholders' Equity (Narrative) (Details) (USD $)
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12 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | |||||||||||||||||||||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2012
Approximations [Member]
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Dec. 31, 2011
Approximations [Member]
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Dec. 31, 2012
Chief Executive Officer [Member]
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Dec. 31, 2012
Issuance of 273,536 5-10 year options [Member]
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Dec. 31, 2012
Issuance of 1,136,748 8-10 year options [Member]
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Dec. 31, 2012
Issuance of 229,558 8-10 year options [Member]
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Dec. 31, 2012
Unregistered Securities [Member]
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Jul. 22, 2010
Registered Direct Offering and Outstanding Warrants [Member]
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Jul. 22, 2010
Registered Direct Offering and Outstanding Warrants [Member]
Approximations [Member]
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Dec. 31, 2012
Minimum [Member]
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Dec. 31, 2012
Minimum [Member]
Chief Executive Officer [Member]
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Dec. 31, 2012
Minimum [Member]
Directors, Officers and Employees [Member]
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Jul. 22, 2010
Minimum [Member]
Registered Direct Offering and Outstanding Warrants [Member]
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Dec. 31, 2012
Maximum [Member]
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Dec. 31, 2012
Maximum [Member]
Chief Executive Officer [Member]
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Dec. 31, 2012
Maximum [Member]
Directors, Officers and Employees [Member]
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Jul. 22, 2010
Maximum [Member]
Registered Direct Offering and Outstanding Warrants [Member]
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Dec. 31, 2012
Stock Compensation Plan [Member]
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Dec. 31, 2012
Maximum restricted shares granted [Member]
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Dec. 31, 2012
Maximum number of shares in respect to stock options [Member]
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Dec. 31, 2012
Maximum restricted shares granted to one person [Member]
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Dec. 31, 2012
Restricted Stock [Member]
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Dec. 31, 2011
Restricted Stock [Member]
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Dec. 31, 2012
Warrants [Member]
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Common Stock, Shares Authorized | 500,000,000 | 500,000,000 | |||||||||||||||||||||||||
Common Stock, Shares, Outstanding | 12,526,240 | 12,427,220 | |||||||||||||||||||||||||
Common stock reserved for issuance | 2,264 | 17,120 | |||||||||||||||||||||||||
Class of Warrant or Right, Outstanding | 1,034,996 | ||||||||||||||||||||||||||
Number of options outstanding | 1,639,842 | 1,674,065 | 1,772,348 | ||||||||||||||||||||||||
Unvested Shares | 43,032 | 120,021 | |||||||||||||||||||||||||
Issued but unvested restricted stock | 14,446 | ||||||||||||||||||||||||||
Total stock and stock equivalents outstanding | 15,246,374 | ||||||||||||||||||||||||||
Common Stock, Capital Shares Reserved for Future Issuance | 2,500,000 | 1,250,000 | 266,667 | 166,667 | |||||||||||||||||||||||
Number of options vested and expected to vest outstanding | 1,523,536 | 1,345,541 | |||||||||||||||||||||||||
Stock option expense | $ 700,000 | $ 1,000,000 | |||||||||||||||||||||||||
Non-qualified stock options | 665,088 | 273,536 | 1,136,748 | 229,558 | |||||||||||||||||||||||
Contractural lives | 2 years 10 months 24 days | 2 years 10 months 24 days | 8 years 2 months 12 days | 8 years 3 months 18 days | |||||||||||||||||||||||
Lower Limit | $ 4.50 | $ 5.42 | $ 5.70 | ||||||||||||||||||||||||
Upper Limit | $ 14.40 | $ 23.85 | $ 19.20 | ||||||||||||||||||||||||
Aggregate intrinsic value | 0 | 0 | |||||||||||||||||||||||||
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value | $ 1.41 | $ 2.04 | |||||||||||||||||||||||||
Unrecognized compensation costs | 100,000 | 400,000 | |||||||||||||||||||||||||
Expected compensation cost | 100,000 | ||||||||||||||||||||||||||
Weighted average recognition period | 1 year | ||||||||||||||||||||||||||
Restricted stock grants estimated forfeiture amount | 14.00% | 3.00% | |||||||||||||||||||||||||
Stock based compensation | 975,421 | 1,513,021 | 1,000,000 | 1,500,000 | |||||||||||||||||||||||
Common Stock issued | 12,540,686 | 12,476,414 | 855 | ||||||||||||||||||||||||
Proceeds from Issuance of Common Stock | 1,733 | 0 | 1,733 | 13,700,000 | |||||||||||||||||||||||
Common stock and warrants sold | 2,069,992 | ||||||||||||||||||||||||||
Common stock to be purchased in the Offering | 1,034,996 | ||||||||||||||||||||||||||
Shares of common stock to be purchased by fixed combination | 0.5 | ||||||||||||||||||||||||||
Purchase price of fixed combination | 6.60 | ||||||||||||||||||||||||||
Warrant exercise price | $ 9.00 | ||||||||||||||||||||||||||
Maximum common stock ownership to be eligible for exercise of warrants | 4.99% | 9.99% | |||||||||||||||||||||||||
Net proceeds from the Offering received after payments of fees and expenses | 12,600,000 | ||||||||||||||||||||||||||
Amount allocated from the Offering to common stock | 9,000,000 | ||||||||||||||||||||||||||
Amount allocated from the Offering to warrants | $ 3,600,000 | ||||||||||||||||||||||||||
Volitility rate | 99.00% | ||||||||||||||||||||||||||
Risk-free interest rate | 2.37% | ||||||||||||||||||||||||||
Dividend yield | 0.00% | ||||||||||||||||||||||||||
Expected term | 7 years |