Note 7 - Revenue From Contracts With Customers

12 Months Ended

Dec. 31, 2021

Notes to Financial Statements

Revenue from Contract with Customer [Text Block]

(7) REVENUE FROM CONTRACTS WITH CUSTOMERS

The following tables provide additional information about our revenue from contracts with customers, including revenue by customer and product type and revenue by market. See also Note 19 for information about revenue by operating segment and geographic region.

	Years Ended December 31,
	2021		2020
Revenue by customer type:
End user	$	72,738	$	48,041
OEM/Integrator		12,140		5,782
	$	84,878	$	53,823
Revenue by product type:
Thermal test	$	19,156	$	15,768
Thermal process		26,260		18,966
Semiconductor test		31,825		13,112
Service/other		7,637		5,977
	$	84,878	$	53,823
Revenue by market:
Semi Market	$	54,937	$	26,870
Industrial		17,257		15,370
Defense/aerospace		4,125		6,314
Automotive		4,325		1,930
Other Multimarket		4,234		3,339
	$	84,878	$	53,823

There were no significant changes in the amount of the allowance for doubtful accounts for the years ended December 31, 2021 and 2020.