v3.3.1.900
Valuation and Qualifying Accounts - Valuation and Qualifying Accounts (Detail) - Allowance for Doubtful Accounts [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance, beginning of year $ 95 $ 373 $ 339
Additions charged to operations 0   34
Deletions from Reserve 0 278  
Balance, end of year $ 95 $ 95 $ 373