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Warrants - Summary of Warrant Activity (Detail) (USD $)
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3 Months Ended |
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Mar. 31, 2014
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| Class of Warrant or Right [Line Items] |
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| Warrants, Exercise Price |
$ 12.28
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| Warrants Outstanding, Beginning Balance |
1,797,114
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| Warrants Exercised |
(15,915)
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| Warrants Outstanding, Ending Balance |
1,781,199
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Warrant Issued With [Member] | Warrants Other Warrants [Member]
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| Class of Warrant or Right [Line Items] |
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| Warrants, Exercise Price |
$ 12.38
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| Warrants Outstanding, Beginning Balance |
1,705,984
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| Warrants Exercised |
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| Warrants Outstanding, Ending Balance |
1,705,984
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Warrant Issued For [Member] | Warrant Derivative [Member]
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| Class of Warrant or Right [Line Items] |
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| Warrants, Exercise Price |
$ 10.00
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| Warrants Outstanding, Beginning Balance |
91,130
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| Warrants Exercised |
(15,915)
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| Warrants Outstanding, Ending Balance |
75,215
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Debt Guarantee [Member] | Warrant Issued With [Member] | Warrants Other Warrants [Member]
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| Class of Warrant or Right [Line Items] |
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| Warrants, Exercise Price |
$ 4.00
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| Warrants Outstanding, Beginning Balance |
174,288
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| Warrants Exercised |
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| Warrants Outstanding, Ending Balance |
174,288
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Debt Guarantee [Member] | Warrant Issued With [Member] | Warrants Other Warrants [Member]
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| Class of Warrant or Right [Line Items] |
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| Warrants, Exercise Price |
$ 10.00
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| Warrants Outstanding, Beginning Balance |
237,500
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| Warrants Exercised |
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| Warrants Outstanding, Ending Balance |
237,500
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Debt Guarantee [Member] | Warrant Issued With [Member] | Warrants Other Warrants [Member]
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| Class of Warrant or Right [Line Items] |
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| Warrants, Exercise Price |
$ 15.00
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| Warrants Outstanding, Beginning Balance |
585,645
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| Warrants Exercised |
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| Warrants Outstanding, Ending Balance |
585,645
|
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Debt Guarantee [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
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| Class of Warrant or Right [Line Items] |
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| Warrants, Exercise Price |
$ 10.00
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| Warrants Outstanding, Beginning Balance |
12,500
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| Warrants Exercised |
(12,500)
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| Warrants Outstanding, Ending Balance |
|
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Series B Preferred Stock [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
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| Class of Warrant or Right [Line Items] |
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| Warrants, Exercise Price |
$ 10.00
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| Warrants Outstanding, Beginning Balance |
18,430
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| Warrants Exercised |
(3,415)
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| Warrants Outstanding, Ending Balance |
15,015
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Financing [Member] | Warrant Issued With [Member] | Warrants Other Warrants [Member]
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| Class of Warrant or Right [Line Items] |
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| Warrants, Exercise Price |
$ 10.00
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| Warrants Outstanding, Beginning Balance |
243,334
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| Warrants Exercised |
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| Warrants Outstanding, Ending Balance |
243,334
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Financing [Member] | Warrant Issued With [Member] | Warrants Other Warrants [Member]
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| Class of Warrant or Right [Line Items] |
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| Warrants, Exercise Price |
$ 15.00
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| Warrants Outstanding, Beginning Balance |
436,079
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| Warrants Exercised |
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| Warrants Outstanding, Ending Balance |
436,079
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Consulting [Member] | Warrant Issued With [Member] | Warrants Other Warrants [Member]
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| Class of Warrant or Right [Line Items] |
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| Warrants, Exercise Price |
$ 10.00
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| Warrants Outstanding, Beginning Balance |
29,138
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| Warrants Exercised |
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| Warrants Outstanding, Ending Balance |
29,138
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Financing [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
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| Class of Warrant or Right [Line Items] |
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| Warrants, Exercise Price |
$ 10.00
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| Warrants Outstanding, Beginning Balance |
60,000
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| Warrants Exercised |
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| Warrants Outstanding, Ending Balance |
60,000
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Consulting [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
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| Class of Warrant or Right [Line Items] |
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| Warrants, Exercise Price |
$ 10.00
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| Warrants Outstanding, Beginning Balance |
200
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| Warrants Exercised |
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| Warrants Outstanding, Ending Balance |
200
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