Senior Notes Payable (Details) (USD $)
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3 Months Ended | 12 Months Ended | 1 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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Feb. 28, 2014
Senior Lender [Member]
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May 30, 2012
Senior Notes Payable [Member]
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Oct. 31, 2011
Senior Notes Payable [Member]
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Apr. 30, 2011
Senior Notes Payable [Member]
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Mar. 31, 2014
Senior Notes Payable [Member]
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Mar. 31, 2013
Senior Notes Payable [Member]
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Dec. 31, 2013
Senior Notes Payable [Member]
|
Dec. 31, 2012
Senior Notes Payable [Member]
|
Dec. 31, 2011
Senior Notes Payable [Member]
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Dec. 31, 2013
Senior Notes Payable [Member]
Prime Rate [Member]
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Debt Instrument [Line Items] | ||||||||||||||
Proceeds from issuance of notes payable and warrants, net of issuance costs | $ 3,500,000 | $ 3,500,000 | $ 500,000 | $ 1,000,000 | $ 3,500,000 | $ 1,500,000 | ||||||||
Principal amount | 5,000,000 | 1,500,000 | ||||||||||||
Term | 30 months | 6 months | ||||||||||||
Stated interest rate | 6.25% | |||||||||||||
Basis spread | 6.25% | |||||||||||||
Minimum interest rate | 9.50% | |||||||||||||
Current and long-term carrying amount | 2,552,632 | 4,341,862 | ||||||||||||
Interest expense | 426,603 | 639,113 | 1,726,455 | 736,346 | 421,793 | 631,098 | 447,570 | 379,312 | ||||||
Number of shares called by warrants | 225,000 | 19,337 | ||||||||||||
Exercise price | 1.00 | 2.10 | 1.75 | |||||||||||
Expiration date | Jun. 01, 2022 | Oct. 31, 2021 | ||||||||||||
Fair value of warrants | 95,760 | 355,116 | 167,256 | |||||||||||
Warrant liability | $ 88,050,250 | $ 377,747 | $ 563,822 | $ 95,760 |