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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Income Taxes [Line Items]      
Valuation allowance related to net deferred tax $ 5.1 $ 3.1  
Effective tax rate (36.40%) (2.90%)  
Ownership change percentage criteria under Section 382 of the Internal Revenue Code 50.00%    
State      
Income Taxes [Line Items]      
State and Federal Operating loss carry-forwards     $ 414.6
State Tax credit carry-forwards     $ 2.6
State and Federal Operating loss carry-forwards expiration year     2035
Federal      
Income Taxes [Line Items]      
State and Federal Operating loss carry-forwards     $ 281.2
State and Federal Operating loss carry-forwards expiration year     2035