Capital and Convertible Redeemable Preferred Stock - Additional Information (Detail) - USD ($)
 1 Months Ended 12 Months Ended
Dec. 03, 2014
Oct. 14, 2014
May. 27, 2014
Dec. 18, 2013
Nov. 30, 2014
Dec. 31, 2015
Dec. 31, 2014
Mar. 31, 2015
Dec. 08, 2014
Jul. 09, 2014
Dec. 31, 2013
Dec. 17, 2013
Jul. 20, 2012
Class of Stock [Line Items]                          
Warrants to purchase shares of common stock 44,531         156,138 156,138 7,398 44,531 6,566     161,977
Percentage of right to receive net sales distribution payment       2.00%                  
Percentage of net sales of entitled distribution payment under new royalty agreement       3.00%                  
Liability for sales distribution payment       $ 13,100,000                  
Reduction of additional paid-in capital             $ 3,520,000            
Extinguishment of Net Sales Distribution Payment Liability redemption provision             15,803,000            
Issuance cost incurred             73,000            
Net proceeds from issuance             $ 10,314,000            
Stock issued, reverse stock split         10.804                
Amount payable for each net sales percentage point redeemed           $ 10,000,000              
Fair value of common stock election period           10 days              
Product Concentration Risk [Member] | Sales Revenue, Net [Member]                          
Class of Stock [Line Items]                          
Royalty Recipients payment of net sales           3.00%              
Investor [Member]                          
Class of Stock [Line Items]                          
Warrants to purchase shares of common stock                         47,828
Common Stock [Member]                          
Class of Stock [Line Items]                          
Shares Issued             5,909,091            
Stock issued upon conversion of convertible redeemable preferred stock 5,158,407           5,158,407            
Advisor [Member]                          
Class of Stock [Line Items]                          
Warrants to purchase shares of common stock                         161,977
Series A Preferred Stock [Member]                          
Class of Stock [Line Items]                          
Stock purchase agreement, shares authorized                         4,535,357
Warrants to purchase shares of common stock                         161,977
Shares issued and sold                         2,647,350
Price per share                         $ 10.80
Investors commitment to purchase preferred shares                         $ 20,648,000
Extinguishment of outstanding shares       2,647,350                  
Carrying value/Fair value of preferred shares                       $ 31,910,000  
Reduction of additional paid-in capital       $ 28,000,000                  
Shares fair value       $ 59,910,000                  
Series A-1 Convertible Redeemable Preferred Stock [Member]                          
Class of Stock [Line Items]                          
Shares issued and sold       955,568                  
Price per share     $ 10.80 $ 10.80                  
Investors commitment to purchase preferred shares       $ 10,324,000                  
Preferred stock par value       $ 0.01   $ 0.01 $ 0.01            
Aggregate proceeds from sale of preferred stock     $ 10,324,000 $ 10,324,000                  
Extinguishment of outstanding shares             1,911,133            
Carrying value/Fair value of preferred shares       $ 14,454,000             $ 14,454,000    
Fair value per share of preferred shares     $ 14.48 $ 15.13                  
Reduction of additional paid-in capital     $ 3,520,000                    
Shares Issued       955,568                  
Share par value, per share     $ 0.01 $ 0.01                  
Issuance cost incurred     $ 10,000                    
Net proceeds from issuance     10,314,000                    
Shares fair value     $ 13,834,000       $ 13,834,000            
Share issued price, per share     $ 10.80 $ 10.80                  
Preferred shares issue     955,565 955,568                  
Series A Convertible Redeemable Preferred Stock [Member]                          
Class of Stock [Line Items]                          
Price per share       $ 16.10                  
Preferred stock par value           $ 0.01 $ 0.01            
Extinguishment of outstanding shares             2,647,350            
Carrying value/Fair value of preferred shares       $ 42,617,000             $ 42,617,000    
Share par value, per share                         $ 0.01
Shares Issued                         49,000,000
Share issued price, per share                         $ 10.80
Preferred shares issue                         2,647,350
Aggregate purchase price                         $ 26,500,000
Stock Purchase Agreement [Member] | Convertible Redeemable Preferred Stock [Member]                          
Class of Stock [Line Items]                          
Preferred stock, dividends rate           8.00%              
Dividends declared or paid             $ 0            
Cumulative dividends for preferred stock             $ 3,307,000            
New Royalty Agreement [Member]                          
Class of Stock [Line Items]                          
Percentage of net sales of entitled distribution payment under new royalty agreement 3.00%                        
Extinguishment of Net Sales Distribution Payment Liability redemption provision   $ 15,803,000                      
New Royalty Agreement [Member] | Series A Preferred Stock [Member]                          
Class of Stock [Line Items]                          
Percentage of right to receive net sales distribution payment           2.00%              
Percentage of net sales of entitled distribution payment under new royalty agreement           3.00%              
Amount payable for each net sales percentage point redeemed           $ 10,000,000