Consolidated Financial Statement Components - Prepaid Expenses and Other (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Supplemental Financial Statement Components [Abstract]
Prepaid repairs and maintenance	$ 2,517	$ 1,561
Prepaid commissions	1,622	594
Prepaid taxes	862	100
Other prepaid expenses	1,636	2,129
Total prepaid expenses and other	$ 6,637	$ 4,384