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Stockholders' Equity (Narrative) (Details) (USD $)
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3 Months Ended | 3 Months Ended | 1 Months Ended | 3 Months Ended | 3 Months Ended | 3 Months Ended | 3 Months Ended | 12 Months Ended | |||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2014
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Mar. 31, 2013
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Dec. 31, 2013
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Dec. 31, 2012
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Mar. 31, 2014
Approximations [Member]
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Mar. 31, 2013
Approximations [Member]
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Mar. 31, 2014
Chief Executive Officer [Member]
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Mar. 31, 2014
Issuance of 255,202 non-qualified 10 year options [Member]
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Mar. 31, 2014
Issuance of 1,146,165 non-qualified 8-10 year options [Member]
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Mar. 31, 2014
Issuance of 162,890 10 year options [Member]
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Oct. 21, 2013
Registered Direct Offering and Outstanding Warrants [Member]
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Jul. 22, 2010
Registered Direct Offering and Outstanding Warrants [Member]
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Oct. 21, 2013
Registered Direct Offering and Outstanding Warrants [Member]
Approximations [Member]
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Jul. 22, 2010
Registered Direct Offering and Outstanding Warrants [Member]
Approximations [Member]
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Mar. 31, 2014
Minimum [Member]
Chief Executive Officer [Member]
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Mar. 31, 2014
Minimum [Member]
Directors, Officers and Employees [Member]
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Mar. 31, 2014
Minimum [Member]
Issuance of 1,146,165 non-qualified 8-10 year options [Member]
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Oct. 21, 2013
Minimum [Member]
Registered Direct Offering and Outstanding Warrants [Member]
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Jul. 22, 2010
Minimum [Member]
Registered Direct Offering and Outstanding Warrants [Member]
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Mar. 31, 2014
Maximum [Member]
Chief Executive Officer [Member]
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Mar. 31, 2014
Maximum [Member]
Directors, Officers and Employees [Member]
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Mar. 31, 2014
Maximum [Member]
Issuance of 1,146,165 non-qualified 8-10 year options [Member]
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Oct. 21, 2013
Maximum [Member]
Registered Direct Offering and Outstanding Warrants [Member]
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Jul. 22, 2010
Maximum [Member]
Registered Direct Offering and Outstanding Warrants [Member]
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Mar. 31, 2014
Stock Compensation Plan [Member]
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Mar. 31, 2014
Maximum restricted shares granted [Member]
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Dec. 31, 2013
Maximum restricted shares granted to one person [Member]
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Mar. 31, 2014
Stock-based compensation [Member]
Approximations [Member]
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Mar. 31, 2013
Stock-based compensation [Member]
Approximations [Member]
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Mar. 31, 2014
Restricted Stock [Member]
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Dec. 31, 2012
Restricted Stock [Member]
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Mar. 31, 2014
Warrants [Member]
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Mar. 31, 2014
Maximum number of shares in respect to stock options [Member]
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Dec. 31, 2011
Employee Stock Option [Member]
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Mar. 31, 2014
Stock and Stock Equivalents [Member]
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| Common Stock, Shares Authorized | 500,000,000 | 500,000,000 | |||||||||||||||||||||||||||||||||
| Common Stock, Shares, Outstanding | 15,064,069 | 15,057,243 | 18,920,789 | ||||||||||||||||||||||||||||||||
| Class of Warrant or Right, Outstanding | 2,284,996 | ||||||||||||||||||||||||||||||||||
| Number of options outstanding | 1,564,257 | 1,564,257 | 1,639,842 | ||||||||||||||||||||||||||||||||
| Unvested Shares | 7,467 | 43,032 | |||||||||||||||||||||||||||||||||
| Common Stock, Capital Shares Reserved for Future Issuance | 2,500,000 | 1,250,000 | 166,667 | 266,667 | |||||||||||||||||||||||||||||||
| Number of options vested and expected to vest outstanding | 1,558,103 | 1,530,200 | |||||||||||||||||||||||||||||||||
| Stock option expense | $ 40,000 | $ 102,000 | |||||||||||||||||||||||||||||||||
| Non-qualified stock options | 665,088 | 255,202 | 1,146,165 | 162,890 | |||||||||||||||||||||||||||||||
| Contractural lives | 10 years | 10 years | 1 year 8 months 12 days | 2 years 3 months 18 days | 8 years | 7 years | 7 years | 10 years | |||||||||||||||||||||||||||
| Lower Limit | $ 4.50 | $ 5.42 | $ 5.70 | ||||||||||||||||||||||||||||||||
| Upper Limit | $ 14.40 | $ 23.85 | $ 15.30 | ||||||||||||||||||||||||||||||||
| Aggregate intrinsic value | 0 | ||||||||||||||||||||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value | $ 2.69 | $ 1.45 | |||||||||||||||||||||||||||||||||
| Unrecognized compensation costs | 1,100 | 19,000 | |||||||||||||||||||||||||||||||||
| Expected compensation cost | 1,100 | ||||||||||||||||||||||||||||||||||
| Weighted average recognition period | 0 years 11 days | ||||||||||||||||||||||||||||||||||
| Share based compensation | 59,796 | 147,163 | 100,000 | 60,000 | 147,000 | ||||||||||||||||||||||||||||||
| Common Stock issued | 15,064,069 | 15,057,243 | |||||||||||||||||||||||||||||||||
| Proceeds from Issuance of Common Stock | 4,400,000 | 13,700,000 | |||||||||||||||||||||||||||||||||
| Common stock and warrants sold | 2,500,000 | 2,069,992 | |||||||||||||||||||||||||||||||||
| Common stock to be purchased in the Offering | 1,250,000 | 1,034,996 | |||||||||||||||||||||||||||||||||
| Exercisable term | 7 years 6 months | ||||||||||||||||||||||||||||||||||
| Shares of common stock to be purchased by fixed combination | 0.5 | 0.5 | |||||||||||||||||||||||||||||||||
| Purchase price of fixed combination | 1.75 | 6.60 | |||||||||||||||||||||||||||||||||
| Warrant exercise price | $ 2.30 | $ 9.00 | |||||||||||||||||||||||||||||||||
| Maximum common stock ownership to be eligible for exercise of warrants | 4.99% | 4.99% | 9.99% | 9.99% | |||||||||||||||||||||||||||||||
| Net proceeds from the Offering received after payments of fees and expenses | 4,000,000 | ||||||||||||||||||||||||||||||||||
| Amount allocated from the Offering to common stock | 2,800,000 | ||||||||||||||||||||||||||||||||||
| Amount allocated from the Offering to warrants | $ 1,200,000 | ||||||||||||||||||||||||||||||||||
| Volitility rate | 104.00% | 94.32% | |||||||||||||||||||||||||||||||||
| Risk-free interest rate | 2.01% | 3.35% | |||||||||||||||||||||||||||||||||
| Dividend yield | 0.00% | 0.00% | |||||||||||||||||||||||||||||||||
| Expected term | 7 years 6 months | 10 years | |||||||||||||||||||||||||||||||||