Net Revenues by Geographic Location (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue, Major Customer [Line Items]
Revenue	$ 44,348	$ 37,733	$ 27,245	$ 20,330	$ 27,494	$ 26,877	$ 17,517	$ 4,952	$ 129,656	$ 76,840	$ 26,060
United States
Revenue, Major Customer [Line Items]
Revenue									129,328	74,839	25,243
Canada
Revenue, Major Customer [Line Items]
Revenue									257	1,839	574
Other
Revenue, Major Customer [Line Items]
Revenue									$ 71	$ 162	$ 243