Note 17 - Enterprise-wide Disclosure (Details) - Operating Segment Summary Information - USD ($) $ in Thousands	3 Months Ended											12 Months Ended
	Jan. 03, 2016		Oct. 04, 2015	Jul. 05, 2015	Apr. 05, 2015	Dec. 28, 2014		Sep. 28, 2014	[2]	Jun. 29, 2014	Mar. 30, 2014	Jan. 03, 2016		Dec. 28, 2014		Dec. 29, 2013
2015
Net Sales	$ 246,636	[1]	$ 254,686	$ 263,637	$ 236,904	$ 272,096	[1]	$ 252,191		$ 260,624	$ 218,992	$ 1,001,863	[3]	$ 1,003,903	[3]	$ 959,989	[3]
Depreciation and amortization												30,803		30,677		24,670
Total assets	756,549					774,914						756,549		774,914
Americas [Member]
2015
Net Sales												593,163		573,458		545,882
Depreciation and amortization												15,390		14,719		13,317
Total assets	223,085					221,324						223,085		221,324
Europe [Member]
2015
Net Sales												262,671		276,845		262,640
Depreciation and amortization												5,007		4,803		3,777
Total assets	249,241					258,847						249,241		258,847
Asia Pacific [Member]
2015
Net Sales												146,029		153,600		151,467
Depreciation and amortization												9,167		9,412		6,332
Total assets	175,940					174,335						175,940		174,335
Operating Segments [Member]
2015
Net Sales												1,001,863		1,003,903		959,989
Depreciation and amortization												29,564		28,934		$ 23,426
Total assets	$ 648,266					$ 654,506						$ 648,266		$ 654,506

[1] Results for the fourth quarter of 2014 include debt retirement expenses of $12.0 million.

[2] Results for the third quarter of 2014 include restructuring and asset impairment charges of $12.4 million.

[3] Revenue attributed to geographic areas is based on the location of the customer.