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13. Derivative Liabilities | 3 Months Ended | 12 Months Ended
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Mar. 31, 2014 | Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |
13. Derivative Liabilities | On May 24, 2011, the Company entered into a Securities Purchase Agreement (the “Purchase Agreement”) with eight investors (collectively, the “Investors”) pursuant to which the Company sold 8,700 shares of a new series of convertible preferred stock designated as Series E Convertible Preferred Stock (“Original Series E”), the terms of which are set forth in the Certificate of Designations of Series E Preferred Stock (the “Certificate”), for $1,000 per share, or $8,700,000. In October 2012, the Company sold 1,000 shares of Series E for $1,000,000 (“New Series E”). The Original Series E and New Series E together are referred to herein as “Series E”. These Series E contained “full ratchet-down” liquidity protection that provided that if the Company issues securities for less than the existing conversion price for the Series E Preferred Stock or the strike price of the Series E warrants, then the conversion price for Series E Preferred Stock will be lowered to that lower price. Also, the strike price for Series E warrants were decreased to that lower price and the number of Series E warrants will be increased such that the product of the original strike price times the original quantity equaled the lower strike price times the higher quantity. Subsequent to the issuance of this Series E, the Company determined that the warrants for these financings included certain embedded derivative features as set forth in ASC Topic 815 and that this conversion feature of the Series E was not an embedded derivative because this feature was clearly and closely related to the host (Series E) as defined in ASC 815. These derivative liabilities were initially recorded at their estimated fair value on the date of issuance and were subsequently adjusted each quarter to reflect the estimated fair value at the end of each period, with any decrease or increase in the estimated fair value of the derivative liability for each period being recorded as other income or expense. Since the value of the embedded derivative feature for the related warrants was higher than the value of both Series E transactions, there was no beneficial conversion feature recorded for either transaction, and the excess of the value of the embedded derivative feature over the value of the transaction was recorded in each period on the Statement of Operations as a separate line item. The fair value of these derivative liabilities was calculated using the Black Scholes pricing model that was based on the closing price of the common stock, the strike price of the underlying instrument, the risk-free interest rate for the applicable remaining life of the underlying instrument (i.e., the U.S. treasury rate for that period) and the historical volatility of the Company’s common stock. These fair value results were extremely sensitive to all these input variables, particularly the closing price of the company’s common stock and the volatility of the Company’s common stock. Accordingly, the fair value of these derivative liabilities were subject to significant changes. During 2013, the Series E and related warrants were converted into common stock and extinguished and the company recorded a gain of $8,980,077 on the decrease in fair value for the derivative security and recorded a gain of $1,635,967 on extinguishment of the derivative liability. The following assumptions were used to calculate the Black Scholes values of this derivative liability as of the measurement dates of March 31, 2013. The fair value of the underlying common stock was based on the sale of 139,166 shares of common stock at $3.00 by the Company during 2013.
Estimated fair value of underlying common stock |  | $ | 3.00 |
Remaining life in years |  |  | 3.15 |
Risk-free interest rate |  |  | 0.38 | %
Expected volatility |  |  | 142 | %
Dividend yield |  |  | – |
| On May 24, 2011, the Company entered into a Securities Purchase Agreement (the “Purchase Agreement”) with eight investors (collectively, the “Investors”) pursuant to which the Company sold 8,700 shares of a new series of convertible preferred stock designated as Series E Convertible Preferred Stock (“Original Series E”), the terms of which are set forth in the Certificate of Designations of Series E Preferred Stock (the “Certificate”), for $1,000 per share, or $8,700,000. In October 2012, the Company sold 1,000 shares of Series E for $1,000,000 (“New Series E”). The Original Series E and New Series E together are referred to herein as “Series E”. These Series E contained “full ratchet-down” liquidity protection that provided that if the Company issues securities for less than the existing conversion price for the Series E Preferred Stock or the strike price of the Series E warrants, then the conversion price for Series E Preferred Stock will be lowered to that lower price. Also, the strike price for Series E warrants were decreased to that lower price and the number of Series E warrants will be increased such that the product of the original strike price times the original quantity equaled the lower strike price times the higher quantity. Subsequent to the issuance of this Series E, the Company determined that the warrants for these financings included certain embedded derivative features as set forth in ASC Topic 815 and that this conversion feature of the Series E was not an embedded derivative because this feature was clearly and closely related to the host (Series E) as defined in ASC 815. These derivative liabilities were initially recorded at their estimated FV on the date of issuance and were subsequently adjusted each quarter to reflect the estimated fair value at the end of each period, with any decrease or increase in the estimated FV of the derivative liability for each period being recorded as other income or expense. Since the value of the embedded derivative feature for the related warrants was higher than the value of both Series E transactions, there was no beneficial conversion feature recorded for either transaction, and the excess of the value of the embedded derivative feature over the value of the transaction was recorded in each period on the Statement of Operations as a separate line item. The fair value of these derivative liabilities was calculated using the Black Scholes pricing model that was based on the closing price of the common stock, the strike price of the underlying instrument, the risk-free interest rate for the applicable remaining life of the underlying instrument (i.e., the U.S. treasury rate for that period) and the historical volatility of the Company’s common stock. These fair value results were extremely sensitive to all these input variables, particularly the closing price of the company’s common stock and the volatility of the Company’s common stock. Accordingly, the fair value of these derivative liabilities were subject to significant changes. During 2013, the Series E and related warrants were converted into common stock and extinguished and the company recorded a gain of $8,980,077 on the decrease in fair value for the derivative security and recorded a gain of $1,635,967 on extinguishment of the derivative liability. The following assumptions were used to calculate the Black Scholes values of this derivative liability as of the measurement dates of March 31, 2013 and as of May 6, 2013. The fair value of the underlying common stock was based on the sale of 139,166 shares of common stock at $3.00 by the Company during 2013.
Estimated fair value of underlying common stock |  |  | $3.00 |
Remaining life in years |  |  | 3.05 - 3.15 |
Risk-free interest rate |  |  | 0.35% - 0.38% |
Expected volatility |  |  | 141% - 142% |
Dividend yield |  |  | – |

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- Definition The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7668309&loc=d3e80748-113994 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41635-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708775-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6441202&loc=d3e80720-113993 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(n)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624258-113959 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624163-113959 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4E -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624181-113959 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5708773-113959 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7668309&loc=d3e80784-113994 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41620-113959 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624177-113959 Reference 15: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959 Reference 16: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959 Reference 17: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579240-113959 Reference 18: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41641-113959 Reference 19: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41638-113959 Reference 20: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
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