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Nature of Business and Operations - Additional Information (Detail)
$ in Thousands
 3 Months Ended
Mar. 20, 2017
USD ($)
Mar. 19, 2017
USD ($)
Mar. 31, 2017
USD ($)
Candidate
Dec. 31, 2016
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Nature Of Business And Operations [Line Items]            
Date of Company's incorporation     Nov. 28, 2005      
Termination fee required to pay   $ 300        
Accumulated deficit     $ 207,019 $ 200,680    
Cash and cash equivalents     $ 12,028 $ 34,950 $ 60,515 $ 75,908
Number of clinical product candidates | Candidate     2      
Novartis Institutes for BioMedical Research, Inc [Member] | Asset Purchase Agreement [Member]            
Nature Of Business And Operations [Line Items]            
Purchase price receivable from sale of assets   6,000        
BlueLink Pharmaceuticals, Inc. [Member] | Asset Purchase Agreement [Member]            
Nature Of Business And Operations [Line Items]            
Proceeds from sale of assets   1,500        
Dare Bioscience [Member]            
Nature Of Business And Operations [Line Items]            
Termination fee required to pay   $ 450        
Dare Bioscience [Member] | Maximum [Member]            
Nature Of Business And Operations [Line Items]            
Minority interest ownership percentage   70.00%        
Dare Bioscience [Member] | Minimum [Member]            
Nature Of Business And Operations [Line Items]            
Minority interest ownership percentage   51.00%        
Hercules Loan Agreement [Member]            
Nature Of Business And Operations [Line Items]            
Pay off loan agreement, amount paid $ 12,400