Supplementary Balance Sheet Information (Tables)

6 Months Ended

Jun. 29, 2018

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Inventories

Inventories

	June 29,		December 31,
	2018		2017
Raw materials	$	61,079	$	57,277
Work-in-process		16,012		14,847
Finished goods		16,700		16,443
Demo and consigned inventory		2,586		2,711
Total inventories	$	96,377	$	91,278

Accrued Expenses and Other Current Liabilities

Accrued Expenses and Other Current Liabilities

	June 29,		December 31,
	2018		2017
Accrued compensation and benefits	$	17,226	$	17,348
Accrued warranty		4,771		4,835
Customer deposits		3,759		3,634
Other		13,419		17,497
Total	$	39,175	$	43,314

Accrued Warranty

Accrued Warranty

	Six Months Ended
	June 29, 2018			June 30, 2017
Balance at beginning of the period	$	4,835		$	3,142
Provision charged to cost of revenue		1,235			1,408
Warranty liabilities acquired from acquisitions		—			419
Use of provision		(1,244	)		(1,101	)
Foreign currency exchange rate changes		(55	)		92
Balance at end of period	$	4,771		$	3,960