Quarterly report pursuant to sections 13 or 15(d)

Warrants - Summary of Warrant Activity (Detail)

v2.4.0.8
Warrants - Summary of Warrant Activity (Detail) (USD $)
6 Months Ended
Jun. 30, 2013
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 12.15
Warrants outstanding, beginning balance 1,102,176
Warrants issued 9,412
Warrants exercised (24,000)
IPO adjustments 838,889
Warrants outstanding, ending balance 1,926,477
Warrant Issued With [Member] | Warrants Other Warrants [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 12.30
Warrants outstanding, beginning balance 293,617
Warrants issued   
Warrants exercised (24,000)
IPO adjustments 1,531,696
Warrants outstanding, ending balance 1,801,313
Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 10.00
Warrants outstanding, beginning balance 808,559
Warrants issued 9,412
Warrants exercised   
IPO adjustments (692,807)
Warrants outstanding, ending balance 125,164
Debt Guarantee [Member] | Warrant Issued With [Member] | Warrants Other Warrants [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 4.00
Warrants outstanding, beginning balance 228,288
Warrants issued   
Warrants exercised (24,000)
IPO adjustments   
Warrants outstanding, ending balance 204,288
Debt Guarantee [Member] | Warrant Issued With [Member] | Warrants Other Warrants [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 10.00
Warrants outstanding, beginning balance   
Warrants issued   
Warrants exercised   
IPO adjustments 237,500
Warrants outstanding, ending balance 237,500
Debt Guarantee [Member] | Warrant Issued With [Member] | Warrants Other Warrants [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 15.00
Warrants outstanding, beginning balance   
Warrants issued   
Warrants exercised   
IPO adjustments 585,645
Warrants outstanding, ending balance 585,645
Debt Guarantee [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 10.00
Warrants outstanding, beginning balance   
Warrants issued   
Warrants exercised   
IPO adjustments 12,500
Warrants outstanding, ending balance 12,500
Debt Guarantee [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 25.00
Warrants outstanding, beginning balance 212,000
Warrants issued   
Warrants exercised   
IPO adjustments (212,000)
Warrants outstanding, ending balance   
Debt Guarantee [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 25.00
Warrants outstanding, beginning balance 95,000
Warrants issued   
Warrants exercised   
IPO adjustments (95,000)
Warrants outstanding, ending balance   
Debt Guarantee [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 25.00
Warrants outstanding, beginning balance 5,000
Warrants issued   
Warrants exercised   
IPO adjustments (5,000)
Warrants outstanding, ending balance   
Debt Guarantee [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 32.45
Warrants outstanding, beginning balance 40,000
Warrants issued   
Warrants exercised   
IPO adjustments (40,000)
Warrants outstanding, ending balance   
Debt Guarantee [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 42.50
Warrants outstanding, beginning balance 38,392
Warrants issued   
Warrants exercised   
IPO adjustments (38,392)
Warrants outstanding, ending balance   
Debt Guarantee [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 42.50
Warrants outstanding, beginning balance 37,000
Warrants issued   
Warrants exercised   
IPO adjustments (37,000)
Warrants outstanding, ending balance   
Series A Preferred Stock [Member] | Warrant Issued With [Member] | Warrants Other Warrants [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 14.10
Warrants outstanding, beginning balance 65,329
Warrants issued   
Warrants exercised   
IPO adjustments   
Warrants outstanding, ending balance 65,329
Series B Preferred Stock [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 10.00
Warrants outstanding, beginning balance   
Warrants issued   
Warrants exercised   
IPO adjustments 52,464
Warrants outstanding, ending balance 52,464
Series B Preferred Stock [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 25.00
Warrants outstanding, beginning balance 52,464
Warrants issued   
Warrants exercised   
IPO adjustments (52,464)
Warrants outstanding, ending balance   
Financing [Member] | Warrant Issued With [Member] | Warrants Other Warrants [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 10.00
Warrants outstanding, beginning balance   
Warrants issued   
Warrants exercised   
IPO adjustments 243,334
Warrants outstanding, ending balance 243,334
Financing [Member] | Warrant Issued With [Member] | Warrants Other Warrants [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 15.00
Warrants outstanding, beginning balance   
Warrants issued   
Warrants exercised   
IPO adjustments 436,079
Warrants outstanding, ending balance 436,079
Consulting [Member] | Warrant Issued With [Member] | Warrants Other Warrants [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 10.00
Warrants outstanding, beginning balance   
Warrants issued   
Warrants exercised   
IPO adjustments 29,138
Warrants outstanding, ending balance 29,138
Financing [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 10.00
Warrants outstanding, beginning balance   
Warrants issued   
Warrants exercised   
IPO adjustments 60,000
Warrants outstanding, ending balance 60,000
Financing [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 25.00
Warrants outstanding, beginning balance 60,000
Warrants issued   
Warrants exercised   
IPO adjustments (60,000)
Warrants outstanding, ending balance   
Financing [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 42.50
Warrants outstanding, beginning balance 75,294
Warrants issued   
Warrants exercised   
IPO adjustments (75,294)
Warrants outstanding, ending balance   
Financing [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 42.50
Warrants outstanding, beginning balance 54,314
Warrants issued 2,941
Warrants exercised   
IPO adjustments (57,255)
Warrants outstanding, ending balance   
Financing [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 42.50
Warrants outstanding, beginning balance 120,865
Warrants issued 6,471
Warrants exercised   
IPO adjustments (127,336)
Warrants outstanding, ending balance   
Consulting [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 10.00
Warrants outstanding, beginning balance   
Warrants issued   
Warrants exercised   
IPO adjustments 200
Warrants outstanding, ending balance 200
Consulting [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 12.50
Warrants outstanding, beginning balance 4,030
Warrants issued   
Warrants exercised   
IPO adjustments (4,030)
Warrants outstanding, ending balance   
Consulting [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 14.10
Warrants outstanding, beginning balance 10,000
Warrants issued   
Warrants exercised   
IPO adjustments (10,000)
Warrants outstanding, ending balance   
Consulting [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 25.00
Warrants outstanding, beginning balance 200
Warrants issued   
Warrants exercised   
IPO adjustments (200)
Warrants outstanding, ending balance   
Consulting [Member] | Warrant Issued For [Member] | Warrant Derivative [Member]
 
Schedule Of Outstanding Options And Warrants [Line Items]  
Warrants, exercise price $ 25.00
Warrants outstanding, beginning balance 4,000
Warrants issued   
Warrants exercised   
IPO adjustments (4,000)
Warrants outstanding, ending balance