Note 6 - Revenue From Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2018

Notes Tables

Schedule of Changes in Allowance for Doubtful Accounts Receivable [Table Text Block]

Balance - January 1, 2018	$	213
Bad debt recovery		(39	)
Write-offs		(22	)
Balance - March 31, 2018	$	152

Disaggregation of Revenue [Table Text Block]

	Three Months Ended March 31,
	2018		2017
Net revenues by customer type:
End user	$	16,328	$	12,486
OEM/Integrator		2,543		1,694
	$	18,871	$	14,180
Net revenues by product type:
Thermal test	$	6,032	$	6,822
Induction heating		5,622		-
Semiconductor production test		5,339		6,162
Service/other		1,878		1,196
	$	18,871	$	14,180
Net revenues by market :
Semiconductor	$	10,539	$	10,439
Industrial		5,653		120
Telecommunications		1,279		2,695
Other non-semiconductor markets		1,400		926
	$	18,871	$	14,180