Supplementary Balance Sheet Information

12 Months Ended

Dec. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Supplementary Balance Sheet Information

10. Supplementary Balance Sheet Information

The following tables provide the details of selected balance sheet items as of the dates indicated (in thousands):

Inventories

	December 31,
	2021		2020
Raw materials	$	84,038	$	55,657
Work-in-process		20,600		15,487
Finished goods		19,486		20,234
Demo and consigned inventory		1,533		1,359
Total inventories	$	125,657	$	92,737

Property, Plant and Equipment, Net

	December 31,
	2021			2020
Cost:
Land, buildings and improvements	$	78,906		$	71,341
Machinery and equipment		98,687			93,494
Total cost		177,593			164,835
Accumulated depreciation		(90,154	)		(86,159	)
Property, plant and equipment, net	$	87,439		$	78,676

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

	Year Ended December 31,
	2021		2020		2019
Depreciation expense	$	13,529	$	13,200	$	11,835

 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,
	2021		2020
Accrued compensation and benefits	$	24,725	$	12,510
Accrued contingent considerations and earn-outs		47,522		10,796
Finance lease obligations		599		9,720
Contract liabilities, current portion		6,995		6,173
Accrued warranty		4,783		4,919
Other		13,855		9,662
Total	$	98,479	$	53,780

Accrued Warranty

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

	Year Ended December 31,
	2021			2020			2019
Balance at beginning of year	$	4,919		$	5,756		$	4,510
Provision charged to cost of revenue		1,410			1,838			2,360
Warranty liabilities acquired from acquisitions		874			—			142
Use of provision		(2,326	)		(2,805	)		(1,282	)
Foreign currency exchange rate changes		(94	)		130			26
Balance at end of year	$	4,783		$	4,919		$	5,756

Other Long Term Liabilities

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

	December 31,
	2021		2020
Finance lease obligations	$	5,309	$	5,908
Accrued pension liabilities		—		1,511
Accrued contingent considerations and earn-outs		3,402		7,276
Other		927		2,471
Total	$	9,638	$	17,166