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Liabilities - Accrued Expenses and Warranty (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Accrued expenses and other current liabilities    
Payroll and related benefits $ 27,816 $ 18,780
Merger consideration payable 17,844  
Warranty 6,555 4,217
Professional fees 3,349 1,827
Installation 1,418 1,382
Sales, use, and other taxes 1,961 1,282
Restructuring liability 1,893 1,796
Interest 2,307  
Other 2,585 3,917
Total $ 65,728 $ 33,201
Accrued Warranty    
Warranty period 1 year  
Balance, beginning of the year $ 4,217  
Warranties issued 4,314  
Addition from Ultratech acquisition 1,889  
Consumption of reserves (4,741)  
Changes in estimate 876  
Balance, end of the year $ 6,555