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Debt - Additional Information (Detail) (USD $)
 12 Months Ended 0 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Panacela Loan [Member]
Dec. 31, 2013
Panacela Loan [Member]
Dec. 31, 2013
Hercules Loan Agreement [Member]
Dec. 31, 2013
Minimum [Member]
Loan Agreement [Member]
Dec. 31, 2013
Maximum [Member]
Loan Agreement [Member]
Dec. 31, 2013
Hercules Technology II, L.P. [Member]
Sep. 30, 2013
Hercules Technology II, L.P. [Member]
Dec. 31, 2013
Hercules Technology II, L.P. [Member]
Warrant [Member]
Dec. 31, 2013
Hercules Technology II, L.P. [Member]
Facility Fee [Member]
Dec. 31, 2013
Hercules Technology II, L.P. [Member]
Payment [Member]
Dec. 31, 2013
Hercules Technology II, L.P. [Member]
Minimum [Member]
Dec. 31, 2013
Hercules Technology II, L.P. [Member]
Maximum [Member]
Sep. 30, 2013
Hercules Technology II, L.P. [Member]
Interest Only Payments [Member]
Sep. 30, 2013
Hercules Technology II, L.P. [Member]
Principle And Interest Payments [Member]
Debt Instrument [Line Items]                              
Debt instrument, Description of variable Rate Basis               Prime              
Debt Instrument, Face Amount   $ 1,530,000         $ 6,000,000 $ 6,000,000              
Proceeds from Notes Payable               5,900,000              
Debt Instrument, Interest Rate, Stated Percentage rate Range, Minimum               10.45%              
Debt Instrument, Basis Spread on variable rate               4.25%              
Debt Instrument, Frequency of Periodic Payment                           12 27
Debt Instrument Penalty rate                       0.01 0.03    
Equity Private Placement                         1,000,000    
Warrant term             5 years                
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)             156,250                
Class of Warrant or Right, Exercise Price of Warrants or Rights     1.694   1.60 2.00 1.60                
Fair value of warrants issued in connection with debt 117,999               117,999            
Debt Instrument, Unamortized Discount                   100,000 550,000        
Debt Issuance Cost             102,000                
Debt Instrument, Interest rate, Effective Percentage             16.60%                
Debt Instrument, interest Rate, stated percentage   16.30%                          
Debt Instrument, Convertible, Conversion Price (in Dollars per Share   $ 1,057                          
Debt Instrument, Convertible, Beneficial Conversion Feature   0.75                          
Debt Instrument, Assignment Percentage     69.20%                        
Interest expense included in interest and other income (expense)     $ 81,142 $ 256,970