Note 6 - Revenue From Contracts With Customers

12 Months Ended

Dec. 31, 2018

Notes to Financial Statements

Revenue from Contract with Customer [Text Block]

( 6 ) 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

12

for information about revenue by operating segment and geographic region.

	Years Ended December 31,
	2018		2017
Net revenues by customer type:
End user	$	68,093	$	60,731
OEM/Integrator		10,470		6,070
	$	78,563	$	66,801
Net revenues by product type:
Thermal test	$	25,289	$	24,657
Induction heating		24,104		11,915
Semiconductor production test		21,445		22,952
Service/other		7,725		7,277
	$	78,563	$	66,801
Net revenues by market:
Semiconductor	$	45,378	$	37,763
Industrial		21,220		14,148
Telecommunications		5,574		10,262
Other non-semiconductor markets		6,391		4,628
	$	78,563	$	66,801

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

December 31, 2018

and

2017

are as follows:

Balance - January 1, 2017	$	146
Bad debt expense		68
Write-offs		(1	)
Balance - December 31, 2017		213
Bad debt expense		20
Write-offs		-
Balance - December 31, 2018	$	233