Note 2 - Business Acquisitions, Goodwill and Other Purchased Intangible Assets (Tables)

6 Months Ended

Jun. 24, 2017

Notes Tables

Schedule of Goodwill [Table Text Block]

	Goodwill
Balance, December 26, 2015	$	60,264
Impact of currency exchange		(1,415	)
Balance, December 31, 2016		58,849
Additions, net		4,821
Impact of currency exchange		2,368
Balance, June 24, 2017	$	66,038

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

	June 24, 2017						December 31, 2016
					Remaining
					Weighted
	Gross				Average		Gross
	Carrying		Accum.		Amort.		Carrying		Accum.
	Amount		Amort.		Period (years)		Amount		Amort.
Developed technology	$	21,009	$	11,396		3.9	$	19,195	$	9,597
Customer relationships		7,983		4,348		3.6		6,996		3,644
Trade names		6,176		734		12.5		5,353		468
Backlog		105		53		0.5		-		-
Total intangible assets	$	35,273	$	16,531			$	31,544	$	13,709

Kita Manufacturing Co. LTD. and Kita USA, Inc. [Member]

Notes Tables

Schedule of Business Acquisitions, by Acquisition [Table Text Block]

Cash paid to Kita shareholders	$	15,000
Fair value of contingent consideration		2,251
Total purchase price	$	17,251

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

Current assets, including cash received	$	10,310
Property, plant and equipment		12,751
Other assets		2,291
Intangible assets subject to amortization		2,000
Goodwill		4,821
Total assets acquired		32,173
Liabilities assumed		(14,922	)
Net assets acquired	$	17,251

Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]

			Average
Description	Estimated Fair Value		Useful Life (years)
Developed technology	$	800		8
Customer relationships		600		4
Product backlog		100		1
Trade names		500		5
	$	2,000