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Quarterly Results of Operations (unaudited) - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Quarterly Financial Information Disclosure [Abstract]              
Revision of previously issued financial statements, resulted decrease in gross profit and increase in operating expenses $ 2,051 $ 1,974 $ 1,824 $ 648 $ 571 $ 759 $ 568