Quarterly report pursuant to Section 13 or 15(d)

Joint Venture Agreement - Additional Information (Detail)

v3.4.0.3
Joint Venture Agreement - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended 12 Months Ended
Oct. 31, 2013
Mar. 31, 2016
Mar. 31, 2015
Sep. 30, 2014
Dec. 31, 2013
Dec. 31, 2016
Dec. 31, 2015
May. 31, 2013
Schedule of Equity Method Investments [Line Items]                
Common stock, shares issued (in shares) 10,000 13,652,000         13,652,000  
Additional expense related to shares issued $ 175,000       $ 231,000      
Joint venture net loss   $ 12,000 $ 207,000          
Joint Venture Agreement                
Schedule of Equity Method Investments [Line Items]                
Percentage of outstanding membership interests in joint venture               50.00%
Investment in joint venture $ 1,000,000     $ 1,000,000        
Fair value of capital contribution in joint venture   6,000,000            
Joint Venture Agreement | Maximum                
Schedule of Equity Method Investments [Line Items]                
Investment in joint venture   4,000,000            
Joint Venture Agreement | Scenario, Forecast                
Schedule of Equity Method Investments [Line Items]                
Investment in joint venture           $ 1,000,000    
Research and Development                
Schedule of Equity Method Investments [Line Items]                
Joint venture net loss   12,000 $ 207,000          
Equity Method Investee                
Schedule of Equity Method Investments [Line Items]                
Due from related parties, current   $ 10,000