Revenue (Tables)

6 Months Ended

Jun. 30, 2022

Revenue from Contract with Customer [Abstract]

Schedule of Sales by End Market

The following tables represent a disaggregation of revenue from contracts with customers for the periods presented (in thousands):

Sales by End Market

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
Industrial	$	21,899	$	24,907	$	45,895	$	46,307
Microfabrication	16,415		20,274		33,734		35,489
Aerospace and Defense	22,513		23,932		45,657		48,662
	$	60,827	$	69,113	$	125,286	$	130,458

Schedule of Sales by Geography

Sales by Geography

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
North America	$	35,682	$	33,095	$	70,826	$	64,229
China	4,672		18,759		11,811		34,336
Rest of World	20,473		17,259		42,649		31,893
	$	60,827	$	69,113	$	125,286	$	130,458

Schedule of Sales by Timing of Revenue

Sales by Timing of Revenue

	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
Point in time	$	45,448	$	50,123	$	93,663	$	97,117
Over time	15,379		18,990		31,623		33,341
	$	60,827	$	69,113	$	125,286	$	130,458

Schedule of Contract Assets and Liabilities

Our contract assets and liabilities are as follows (in thousands):

	Balance Sheet Classification	As of
		June 30, 2022		December 31, 2021
Contract assets	Prepaid expenses and other current assets	$	7,620	$	9,657
Contract liabilities	Deferred revenues and other long-term liabilities	3,343		2,358