Note 4 - Revenue From Contracts With Customers

12 Months Ended

Dec. 31, 2019

Notes to Financial Statements

Revenue from Contract with Customer [Text Block]

( 4 ) 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

15

for information about revenue by operating segment and geographic region.

	Years Ended December 31,
	2019		2018
Net revenues by customer type:
End user	$	55,074	$	68,093
OEM/Integrator		5,586		10,470
	$	60,660	$	78,563
Net revenues by product type:
Thermal test	$	17,631	$	23,654
Thermal process		20,079		25,739
Semiconductor test		16,273		21,445
Service/other		6,677		7,725
	$	60,660	$	78,563
Net revenues by market:
Semi	$	30,953	$	45,378
Industrial		21,231		21,220
Defense/aerospace		4,842		4,943
Telecommunications		1,845		5,574
Other Multimarket		1,789		1,448
	$	60,660	$	78,563

Changes in the amount of the allowance for doubtful accounts for the years ended

December 31, 2019

and

2018

are as follows:

Balance - January 1, 2018	$	213
Bad debt expense		20
Write-offs		-
Balance - December 31, 2018		233
Bad debt expense		3
Write-offs		(25	)
Balance - December 31, 2019	$	211