Supplementary Balance Sheet Information (Tables)

12 Months Ended

Dec. 31, 2017

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Inventories

Inventories

	December 31,
	2017		2016
Raw materials	$	57,277	$	39,822
Work-in-process		14,847		8,012
Finished goods		16,443		9,511
Demo and consigned inventory		2,711		2,400
Total inventories	$	91,278	$	59,745

Property, Plant and Equipment, net

Property, Plant and Equipment, Net

	December 31,
	2017			2016
Cost:
Land, buildings and improvements	$	53,055		$	38,384
Machinery and equipment		74,122			52,136
Total cost		127,177			90,520
Accumulated depreciation		(65,459	)		(55,099	)
Property, plant and equipment, net	$	61,718		$	35,421

Summary of Depreciation Expense on Property, Plant and Equipment, Including Demo Units and Assets under Capital Leases

The following table summarizes depreciation expense on property, plant and equipment, including demo units and assets under capital leases (in thousands):

	Year Ended December 31,
	2017		2016		2015
Depreciation expense	$	9,838	$	8,558	$	7,873

Summary of Total Accumulated Depreciation on Assets under Capital Leases

The following table summarizes total accumulated depreciation on assets under capital leases as of the dates indicated (in thousands):

	December 31,
	2017		2016
Accumulated depreciation on assets under capital leases	$	6,097	$	4,950

Accrued Expenses and Other Current Liabilities

The following table summarizes accrued expenses and other current liabilities as of the dates indicated (in thousands):

	December 31,
	2017		2016
Accrued compensation and benefits	$	17,348	$	9,647
Accrued warranty		4,835		3,142
Accrued restructuring		440		1,371
Accrued professional services		1,469		1,237
Accrued contingent considerations		2,800		2,775
Customer deposits		3,634		1,164
Other		12,788		7,612
Total	$	43,314	$	26,948

Accrued Warranty

The following table summarizes accrued warranty activities for the periods indicated (in thousands):

	Year Ended December 31,
	2017			2016			2015
Balance at beginning of year	$	3,142		$	3,335		$	3,044
Provision charged to cost of revenue		3,169			1,673			2,025
Warranty liabilities acquired from acquisitions		1,307			23			132
Use of provision		(2,857	)		(1,849	)		(1,454	)
Divestiture of JK Lasers		—			—			(389	)
Foreign currency exchange rate changes		74			(40	)		(23	)
Balance at end of year	$	4,835		$	3,142		$	3,335

Summary of Other Long Term Liabilities

The following table summarizes other long term liabilities as of the dates indicated (in thousands):

	December 31,
	2017		2016
Capital lease obligations	$	7,947	$	8,111
Accrued pension liabilities		3,853		5,957
Accrued contingent considerations		1,304		2,381
Other		2,037		2,264
Total	$	15,141	$	18,713