Supplementary Balance Sheet Information (Tables)

12 Months Ended

Dec. 31, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Inventories

Inventories

	December 31,
	2023		2022
Raw materials	$	104,643	$	118,292
Work-in-process		21,010		23,328
Finished goods		23,311		25,738
Demo and consigned inventory		407		639
Total inventories	$	149,371	$	167,997

Property, Plant and Equipment, Net

Property, Plant and Equipment, Net

	December 31,
	2023			2022
Cost:
Land, buildings and improvements	$	95,020		$	86,026
Machinery and equipment		117,487			110,212
Total cost		212,507			196,238
Accumulated depreciation		(103,058	)		(93,052	)
Property, plant and equipment, net	$	109,449		$	103,186

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

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,
	2023		2022		2021
Depreciation expense	$	14,017	$	13,550	$	13,529

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,
	2023		2022
Accrued compensation and benefits	$	32,703	$	35,501
Finance lease obligations		718		668
Contract liabilities, current portion		5,553		8,128
Accrued warranty		5,292		5,127
Other		16,790		13,620
Total	$	61,056	$	63,044

Accrued Warranty

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

	Year Ended December 31,
	2023			2022			2021
Balance at beginning of year	$	5,127		$	4,783		$	4,919
Provision charged to cost of revenue		2,445			3,071			1,410
Warranty liabilities acquired from acquisitions		—			—			874
Use of provision		(2,338	)		(2,615	)		(2,326	)
Foreign currency exchange rate changes		58			(112	)		(94	)
Balance at end of year	$	5,292		$	5,127		$	4,783

Other Long Term Liabilities

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

	December 31,
	2023		2022
Finance lease obligations	$	3,934	$	4,652
Accrued contingent considerations and earn-outs		311		301
Other		1,687		1,132
Total	$	5,932	$	6,085