Note 6 - Revenue From Contracts with Customers (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

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

Balance - January 1, 2018	$	213
Bad debt expense		50
Write-offs		(30	)
Balance - June 30, 2018	$	233

Disaggregation of Revenue [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Net revenues by customer type:
End user	$	18,173	$	15,029	$	34,502	$	27,515
OEM/Integrator		2,924		859		5,466		2,553
	$	21,097	$	15,888	$	39,968	$	30,068
Net revenues by product type:
Thermal test	$	6,389	$	6,312	$	12,420	$	13,134
Induction heating		5,937		1,725		11,559		1,725
Semiconductor production test		6,809		6,053		12,148		12,216
Service/other		1,962		1,798		3,841		2,993
	$	21,097	$	15,888	$	39,968	$	30,068
Net revenues by market:
Semiconductor	$	13,043	$	10,155	$	23,582	$	20,594
Industrial		5,000		2,178		10,653		2,298
Telecommunications		1,343		2,196		2,622		4,891
Other non-semiconductor markets		1,711		1,359		3,111		2,285
	$	21,097	$	15,888	$	39,968	$	30,068