Supplementary Balance Sheet Information (Tables)

3 Months Ended

Apr. 02, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Inventories

Inventories

	April 2,		December 31,
	2021		2020
Raw materials	$	52,752	$	55,657
Work-in-process		15,406		15,487
Finished goods		20,442		20,234
Demo and consigned inventory		1,344		1,359
Total inventories	$	89,944	$	92,737

Accrued Expenses and Other Current Liabilities

Accrued Expenses and Other Current Liabilities

	April 2,		December 31,
	2021		2020
Accrued compensation and benefits	$	16,399	$	12,510
Accrued warranty		4,514		4,919
Contract liabilities, current portion		5,292		6,173
Finance lease obligations		574		9,720
Accrued earn-out and contingent considerations		11,094		10,796
Other		10,788		9,662
Total	$	48,661	$	53,780

Accrued Warranty

Accrued Warranty

	Three Months Ended
	April 2,			April 3,
	2021			2020
Balance at beginning of the period	$	4,919		$	5,756
Provision charged to cost of revenue		324			496
Use of provision		(690	)		(535	)
Foreign currency exchange rate changes		(39	)		(102	)
Balance at end of the period	$	4,514		$	5,615

Other Long Term Liabilities

Other Long Term Liabilities

	April 2,		December 31,
	2021		2020
Finance lease obligations	$	5,760	$	5,908
Accrued pension liabilities		1,132		1,511
Accrued contingent considerations		4,999		7,276
Other		2,445		2,471
Total	$	14,336	$	17,166