Supplementary Balance Sheet Information (Tables)

6 Months Ended

Jun. 30, 2017

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Inventories

Inventories

	June 30,		December 31,
	2017		2016
Raw materials	$	50,139	$	39,822
Work-in-process		9,427		8,012
Finished goods		13,725		9,511
Demo and consigned inventory		3,505		2,400
Total inventories	$	76,796	$	59,745

Accrued Expenses and Other Current Liabilities

Accrued Expenses and Other Current Liabilities

	June 30,		December 31,
	2017		2016
Accrued compensation and benefits	$	14,288	$	9,647
Accrued warranty		3,960		3,142
Accrued restructuring		782		1,371
Accrued professional services		1,366		1,237
Accrued contingent considerations		2,950		2,775
Customer deposits		2,297		1,164
Other		8,355		7,612
Total	$	33,998	$	26,948

Accrued Warranty

Accrued Warranty

	Six Months Ended
	June 30, 2017			July 1, 2016
Balance at beginning of the period	$	3,142		$	3,335
Provision charged to cost of revenue		1,408			639
Acquisition related warranty accrual		419			23
Use of provision		(1,101	)		(797	)
Foreign currency exchange rate changes		92			(21	)
Balance at end of period	$	3,960		$	3,179

Summary of Other Long Term Liabilities

Other Long Term Liabilities

	June 30,		December 31,
	2017		2016
Capital lease obligations	$	7,902	$	8,111
Accrued pension liabilities		5,551		5,957
Accrued contingent considerations		—		2,381
Other		1,901		2,264
Total	$	15,354	$	18,713