Supplementary Balance Sheet Information (Tables)

9 Months Ended

Oct. 02, 2020

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Inventories

Inventories

	October 2,		December 31,
	2020		2019
Raw materials	$	63,569	$	76,268
Work-in-process		16,517		15,096
Finished goods		20,201		23,431
Demo and consigned inventory		1,450		1,823
Total inventories	$	101,737	$	116,618

Accrued Expenses and Other Current Liabilities

Accrued Expenses and Other Current Liabilities

	October 2,		December 31,
	2020		2019
Accrued compensation and benefits	$	10,964	$	15,359
Accrued warranty		5,102		5,756
Contract liabilities, current portion		4,540		3,219
Deferred purchase price for acquisitions		23,463		27,735
Finance lease obligations		9,503		1,307
Accrued earn-out and contingent considerations		11,626		3,813
Other		11,038		13,137
Total	$	76,236	$	70,326

Accrued Warranty

Accrued Warranty

	Nine Months Ended
	October 2,			September 27,
	2020			2019
Balance at beginning of the period	$	5,756		$	4,510
Provision charged to cost of revenue		1,255			1,903
Warranty liabilities from acquisitions		—			175
Use of provision		(1,941	)		(1,802	)
Foreign currency exchange rate changes		32			(58	)
Balance at end of the period	$	5,102		$	4,728

Other Long Term Liabilities

Other Long Term Liabilities

	October 2,		December 31,
	2020		2019
Finance lease obligations	$	6,052	$	14,845
Accrued pension liabilities		289		1,473
Accrued contingent considerations		10,238		16,504
Other		3,009		4,065
Total	$	19,588	$	36,887