Note 3 - Goodwill and Purchased Intangible Assets (Tables)

12 Months Ended

Dec. 29, 2018

Notes Tables

Schedule of Goodwill [Table Text Block]

	Semiconductor Test & Inspection (1)			PCB Test			Total Goodwill
Balance December 31, 2016	$	58,849		$	-		$	58,849
Additions		2,654			-			2,654
Impact of currency exchange		4,110			-			4,110
Balance December 30, 2017		65,613			-			65,613
Additions		157,661			21,602			179,263
Impact of currency exchange		(2,466	)		(283	)		(2,749	)
Balance December 29, 2018	$	220,808		$	21,319		$	242,127

Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table Text Block]

	December 29, 2018					December 30, 2017
					Remaining
	Gross Carrying		Accumulated		Useful Life	Gross Carrying		Accumulated
	Amount		Amortization		(years)	Amount		Amortization
Developed technology	$	214,266	$	21,197	7.4	$	20,780	$	12,623
Customer relationships		73,104		7,378	10.1		7,934		4,838
Trade names		22,701		1,807	10.5		6,185		972
Backlog		6,372		4,696	0.5		-		-
Favorable leases		1,100		62	5.3		-		-
Covenant not-to-compete		314		63	8.0		313		31
	$	317,857	$	35,203		$	35,212	$	18,464