Other Accrued Liabilities - Schedule of Other Accrued Liabilities (Detail) - USD ($) $ in Thousands		12 Months Ended
	Jan. 06, 2017	Dec. 31, 2017	Dec. 31, 2016
Other Accrued Liabilities [Line Items]
Payroll taxes		$ 6,591	$ 3,151
Property, sales and other taxes		8,340	6,258
Commissions payable		408	1,424
Accrued vendor costs		7,068	2,185
Accrued warranties		1,535	3,853
Other		1,596	1,245
Total		25,538	$ 18,116
Technology Alliance Inc.
Other Accrued Liabilities [Line Items]
Purchase price as a result of business acquisition	$ 20,000	$ 2,000