Note 2 - Goodwill and Purchased Intangible Assets (Tables)

9 Months Ended

Sep. 25, 2021

Notes Tables

Schedule of Goodwill [Table Text Block]

	Semiconductor Test
	& Inspection			PCB Test			Total
Balance, December 28, 2019	$	218,775		$	19,894		$	238,669
Impact of currency exchange		11,949			1,686			13,635
Balance, December 26, 2020		230,724			21,580			252,304
Sale of PCB Test business (1)		-			(21,899	)		(21,899	)
Impact of currency exchange		(7,041	)		319			(6,722	)
Balance, September 25, 2021	$	223,683		$	-		$	223,683

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

	September 25, 2021						December 26, 2020
					Remaining
					Weighted
	Gross				Average		Gross
	Carrying		Accum.		Amort.		Carrying		Accum.
	Amount		Amort.		Period (in years)		Amount		Amort.
Developed technology	$	237,525	$	101,952		4.8	$	239,250	$	83,246
Customer relationships		66,662		25,037		7.7		74,933		22,751
Trade names		21,096		7,295		7.5		23,756		6,279
Covenant not-to-compete		318		151		5.3		340		136
Total intangible assets	$	325,601	$	134,435			$	338,279	$	112,412