Quarterly report pursuant to Section 13 or 15(d)

Term Loan Facilities - Additional Information (Detail)

v3.3.0.814
Term Loan Facilities - Additional Information (Detail) - USD ($)
1 Months Ended 9 Months Ended
Aug. 07, 2015
Sep. 30, 2013
Aug. 31, 2015
Sep. 30, 2015
Jan. 31, 2014
Debt Instrument [Line Items]          
Facility loan, drawn       $ 9,482,000  
Exercise price of common stock     $ 2.84 $ 2.84  
Issued warrants to purchase common stock     114,436 114,436  
Warrant term     10 years 10 years  
Fair value of warrant liabilities     $ 300,000 $ 300,000 $ 400,000
Warrants, Exercise price of $5.00 per share [Member]          
Debt Instrument [Line Items]          
Warrants issued   121,739      
Exercise price of common stock   $ 5.00      
2013 Term Loan Facility [Member]          
Debt Instrument [Line Items]          
Maximum borrowing capacity   $ 10,000,000      
Facility loan, interest amortization period   36 months      
Facility loan, final interest payment   $ 300,000      
Retiring of existing debt $ 4,100,000        
2013 Term Loan Facility [Member] | First Tranche [Member]          
Debt Instrument [Line Items]          
Facility loan, drawn   $ 5,000,000      
Facility loan, fixed interest rate   8.75%      
2013 Term Loan Facility [Member] | Second Tranche [Member]          
Debt Instrument [Line Items]          
Facility loan, fixed interest rate       8.75%  
Facility loan available for drawdown   $ 5,000,000      
2013 Term Loan Facility [Member] | Second Tranche [Member] | Wall Street Journal Prime Rate [Member]          
Debt Instrument [Line Items]          
Facility loan, prime rate plus       4.25%  
2015 Term Loan Facility [Member]          
Debt Instrument [Line Items]          
Maximum borrowing capacity $ 15,000,000        
Debt instrument payment terms       Under the first tranche, the Company is required to make 12 monthly interest only payments after the funding date followed by a repayment schedule equal to 36 equal monthly payments of interest and principal.  
Percentage of principal amount as final payment 6.50%        
Prepayment fee percentage 3.00%        
Facility fee 1.00%        
2015 Term Loan Facility [Member] | Minimum [Member]          
Debt Instrument [Line Items]          
Upfront Payment $ 35,000,000        
2015 Term Loan Facility [Member] | First Tranche [Member]          
Debt Instrument [Line Items]          
Maximum borrowing capacity $ 10,000,000        
Facility loan, fixed interest rate 8.77%        
Facility loan available upon closing $ 10,000,000        
2015 Term Loan Facility [Member] | First Tranche [Member] | Minimum [Member]          
Debt Instrument [Line Items]          
Facility loan, fixed interest rate 8.75%        
2015 Term Loan Facility [Member] | First Tranche [Member] | Wall Street Journal Prime Rate [Member] | Minimum [Member]          
Debt Instrument [Line Items]          
Facility loan, fixed interest rate 8.47%        
2015 Term Loan Facility [Member] | Second Tranche [Member]          
Debt Instrument [Line Items]          
Maximum borrowing capacity $ 5,000,000        
Facility loan available for drawdown $ 5,000,000