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Commitments and Contingencies - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 02, 2014
Commitments And Contingencies Disclosure [Abstract]        
Total rental expense $ 121 $ 753 $ 423  
Minimum annual spend towards covered loss       $ 5,000
Agreement, terms period June 1, 2016 through May 31, 2025