Note 2 - Goodwill and Purchased Intangible Assets (Tables)

12 Months Ended

Dec. 25, 2021

Notes Tables

Schedule of Goodwill [Table Text Block]

	Semiconductor Test & Inspection			PCB Test			Total Goodwill
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		(10,933	)		319			(10,614	)
Balance December 25, 2021	$	219,791		$	-		$	219,791

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

	December 25, 2021						December 26, 2020
					Remaining
	Gross Carrying		Accumulated		Useful Life		Gross Carrying		Accumulated
	Amount		Amortization		(years)		Amount		Amortization
Developed technology	$	229,131	$	104,855		4.5	$	239,250	$	83,246
Customer relationships		65,916		26,189		7.4		74,933		22,751
Trade names		20,877		7,714		7.3		23,756		6,279
Covenant not-to-compete		308		154		5.0		340		136
	$	316,232	$	138,912			$	338,279	$	112,412