Supplementary Balance Sheet Information (Tables)

6 Months Ended

Jul. 01, 2016

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Inventories

Inventories

	July 1, 2016		December 31, 2015
Raw materials	$	35,986	$	38,511
Work-in-process		12,261		10,138
Finished goods		10,160		9,266
Demo and consigned inventory		1,574		1,651
Total inventories	$	59,981	$	59,566

Accrued Expenses and Other Current Liabilities

Accrued Expenses and Other Current Liabilities

	July 1, 2016		December 31, 2015
Accrued compensation and benefits	$	8,726	$	7,357
Accrued warranty		3,179		3,335
Accrued restructuring		3,030		1,652
Accrued contingent considerations		3,671		—
Accrued professional services fees and other		10,298		8,838
Total	$	28,904	$	21,182

Accrued Warranty

Accrued Warranty

	Six Months Ended
	July 1, 2016			July 3, 2015
Balance at beginning of the period	$	3,335		$	3,044
Provision charged to cost of revenue		639			1,524
Acquisition related warranty accrual		23			94
Use of provision		(797	)		(730	)
Divestiture of JK Lasers		—			(392	)
Foreign currency exchange rate changes		(21	)		(1	)
Balance at end of period	$	3,179		$	3,539

Summary of Other Long Term Liabilities

Other Long Term Liabilities

	July 1, 2016		December 31, 2015
Capital lease obligations	$	8,598	$	9,173
Accrued pension liabilities		2,769		3,693
Accrued contingent considerations		1,645		3,889
Other		2,500		2,690
Total	$	15,512	$	19,445