Note 3 - Goodwill and Purchased Intangible Assets (Tables)

12 Months Ended

Dec. 28, 2019

Notes Tables

Schedule of Goodwill [Table Text Block]

	Semiconductor Test & Inspection			PCB Test			Total Goodwill
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
Adjustments		2,117			(983	)		1,134
Impairments (1)		(715	)		-			(715	)
Impact of currency exchange		(3,435	)		(442	)		(3,877	)
Balance December 28, 2019	$	218,775		$	19,894		$	238,669

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

	December 28, 2019						December 29, 2018
					Remaining
	Gross Carrying		Accumulated		Useful Life		Gross Carrying		Accumulated
	Amount		Amortization		(years)		Amount		Amortization
Developed technology	$	227,619	$	49,805		6.6	$	214,266	$	21,197
Customer relationships		72,251		14,824		9.3		73,104		7,378
Trade names		22,612		3,892		9.5		22,701		1,807
Backlog		6,328		6,328		-		6,372		4,696
Favorable leases*		-		-		-		1,100		62
Covenant not-to-compete		322		96		7.0		314		63
	$	329,132	$	74,945			$	317,857	$	35,203