Note 6 - Employee Benefit Plans (Tables)

12 Months Ended

Dec. 30, 2017

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

(in thousands)	2017			2016			2015
Service cost	$	907		$	868		$	856
Interest cost		198			245			311
Expected return on assets		(119	)		(147	)		(193	)
Settlements		-			-			235
Net periodic costs	$	986		$	966		$	1,209

Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block]

(in thousands)	2017			2016
Change in projected benefit obligation:
Benefit obligation at beginning of year	$	(27,499	)	$	(25,483	)
Service cost		(907	)		(868	)
Interest cost		(198	)		(245	)
Actuarial loss		(628	)		(796	)
Participant contributions		(789	)		(719	)
Benefits paid		743			(214	)
Foreign currency exchange adjustment		(1,234	)		826
Benefit obligation at end of year		(30,512	)		(27,499	)
Change in plan assets:
Fair value of plan assets at beginning of year		16,077			14,716
Return on assets, net of actuarial loss		112			189
Employer contributions		789			719
Participant contributions		789			719
Benefits paid		(743	)		214
Foreign currency exchange adjustment		722			(480	)
Fair value of plan assets at end of year		17,746			16,077
Net liability at end of year	$	(12,766	)	$	(11,422	)

Schedule of Assumptions Used [Table Text Block]

	2017		2016
Discount rate		0.7%		0.7%
Compensation increase		1.8%		1.5%

	2017		2016		2015
Discount rate		0.7%		1.0%		1.3%
Rate of return on Assets		0.7%		1.0%		1.3%
Compensation increase		1.5%		1.8%		1.8%

Schedule of Net Funded Status [Table Text Block]

(in thousands)	2017			2016
Accumulated benefit obligation at beginning of year	$	2,490		$	2,649
Interest cost		95			109
Actuarial (gain) loss		677			(185	)
Benefits paid		(114	)		(83	)
Accumulated benefit obligation at end of year		3,148			2,490
Plan assets at end of year		-			-
Funded status	$	(3,148	)	$	(2,490	)

Share-based Compensation, Stock Options, Activity [Table Text Block]

	2017					2016					2015
				Wt. Avg.					Wt. Avg.					Wt. Avg.
(in thousands, except per share data)	Shares			Ex. Price		Shares			Ex. Price		Shares			Ex. Price
Outstanding, beginning of year		1,641		$	10.79		1,965		$	11.25		2,435		$	11.67
Granted		-			N/A		-			N/A		10		$	10.98
Exercised		(1,164	)	$	10.98		(101	)	$	7.89		(175	)	$	8.65
Cancelled		(5	)	$	20.73		(223	)	$	16.19		(305	)	$	16.07
Outstanding, end of year		472		$	10.20		1,641		$	10.79		1,965		$	11.25
Options exercisable at year end		469		$	10.20		1,537		$	10.85		1,673		$	11.47

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

			Options Outstanding						Options Exercisable
					Approximate
					Wt. Avg.
Range of			Number		Remaining		Wt. Avg.		Number		Wt. Avg.
Exercise Prices			Outstanding		Life (Years)		Ex. Price		Exercisable		Ex. Price
$7.32	-	$9.44		248		4.7	$	9.16		248	$	9.16
$9.45	-	$10.54		26		4.8	$	10.41		26	$	10.41
$10.55	-	$17.67		198		4.2	$	11.48		195	$	11.49
				472		4.5	$	10.20		469	$	10.20

Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]

	2017					2016					2015
				Wt. Avg.					Wt. Avg.					Wt. Avg.
(in thousands, except per share data)	Units			Fair Value		Units			Fair Value		Units			Fair Value
Outstanding, beginning of year		1,083		$	10.50		1,078		$	9.93		1,026		$	9.54
Granted		353		$	15.95		471		$	11.25		482		$	10.54
Released		(409	)	$	10.26		(409	)	$	9.90		(339	)	$	9.63
Cancelled		(46	)	$	11.85		(57	)	$	10.25		(91	)	$	9.82
Outstanding, end of year		981		$	12.50		1,083		$	10.50		1,078		$	9.93

Schedule of Share-based Compensation, Equity-based Performance Stock Units [Table Text Block]

Year Grante d	Range of Award s				Performance Criteria Period (in years)
201 7		25%	-	200%		3
201 6		25%	-	200%		3
201 5		25%	-	200%		2
201 4		0%	-	150%		2

Schedule of Nonvested Performance-based Units Activity [Table Text Block]

	2017					2016					2015
				Wt. Avg.					Wt. Avg.					Wt. Avg.
(in thousands, except per share data)	Units			Fair Value		Units			Fair Value		Units			Fair Value
Outstanding, beginning of year		403		$	11.04		376		$	10.80		334		$	10.49
Granted		185		$	17.60		222		$	11.38		156		$	10.69
Released		(186	)	$	11.35		(172	)	$	11.27		(38	)	$	9.52
Cancelled		(68	)	$	11.94		(23	)	$	8.75		(76	)	$	9.86
Outstanding, end of year		334		$	14.31		403		$	11.04		376		$	10.80

Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]

Employee Stock Purchase Plan	2017	2016	2015
Dividend yield	1.4%	2.0%	2.2%
Expected volatility	33.3%	31.2%	35.3%
Risk-free interest rate	0.7%	0.3%	0.1%
Expected term (years)	0.5	0.5	0.5
Weighted-average grant date fair value per share	$4.63	$2.82	$2.71

Employee Stock Options	2017 (1)	2016 (1)	2015
Dividend yield	N/A	N/A	2.1%
Expected volatility	N/A	N/A	39.1%
Risk-free interest rate	N/A	N/A	1.6%
Expected term (years)	N/A	N/A	5.9
Weighted-average grant date fair value per share	N/A	N/A	$3.46

Restricted Stock Units	2017	2016	2015
Dividend yield	1.4%	2.0%	2.1%

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

(in thousands)	2017			2016			2015
Cost of sales	$	423		$	398		$	566
Research and development		1,054			1,292			1,092
Selling, general and administrative		5,530			5,453			5,097
Share-based compensation of continuing operations		7,007			7,143			6,755
Discontinued operations		-			-			138
Income tax benefit		(530	)		(269	)		(249	)
Total share-based compensation, net of tax	$	6,477		$	6,874		$	6,644