Quarterly report pursuant to Section 13 or 15(d)

Joint Venture Agreement - Additional Information (Detail)

v3.7.0.1
Joint Venture Agreement - Additional Information (Detail) - USD ($)
3 Months Ended 46 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2017
May 31, 2013
Schedule of Equity Method Investments [Line Items]        
Joint venture net loss $ 12,000 $ 12,000    
Joint Venture Agreement        
Schedule of Equity Method Investments [Line Items]        
Percentage of outstanding membership interests in joint venture       50.00%
Investment in joint venture     $ 2,000,000  
Fair value of capital contribution in joint venture 6,000,000   6,000,000  
Joint Venture Agreement | Maximum        
Schedule of Equity Method Investments [Line Items]        
Required payments to acquire interest in joint venture       $ 6,000,000
Research and Development        
Schedule of Equity Method Investments [Line Items]        
Joint venture net loss 12,000 $ 12,000,000    
Equity Method Investee        
Schedule of Equity Method Investments [Line Items]        
Due from related parties, current $ 10,000   $ 10,000