Note 2 - Goodwill and Purchased Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Goodwill [Table Text Block]

	Semiconductor Test & Inspection			PCB Test			Total Goodwill
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
Impact of currency exchange		(6,252	)		-			(6,252	)
Balance December 31, 2022	$	213,539		$	-		$	213,539

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

	December 31, 2022						December 25, 2021
					Remaining
	Gross Carrying		Accumulated		Useful Life		Gross Carrying		Accumulated
	Amount		Amortization		(years)		Amount		Amortization
Developed technology	$	224,253	$	128,938		3.6	$	229,131	$	104,855
Customer relationships		64,632		31,015		6.5		65,916		26,189
Trade names		20,461		9,397		6.4		20,877		7,714
Covenant not-to-compete		269		161		4.0		308		154
	$	309,615	$	169,511			$	316,232	$	138,912