Note 17 - Enterprise-wide Disclosure (Details) - Revenue and Long-Lived Assets Related to Operations - 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
SALES TO UNAFFILIATED CUSTOMERS(1)
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]
LONG-LIVED ASSETS(2)
Long-Lived Assets	[4]	211,489					227,347						211,489		227,347
UNITED STATES
SALES TO UNAFFILIATED CUSTOMERS(1)
Net Sales	[3]												520,375		487,001		458,585
LONG-LIVED ASSETS(2)
Long-Lived Assets	[4]	79,279					86,856						79,279		86,856
UNITED KINGDOM
SALES TO UNAFFILIATED CUSTOMERS(1)
Net Sales	[3]												72,445		83,182		75,076
LONG-LIVED ASSETS(2)
Long-Lived Assets	[4]	10,653					10,604						10,653		10,604
AUSTRALIA
SALES TO UNAFFILIATED CUSTOMERS(1)
Net Sales	[3]												76,600		79,922		78,569
LONG-LIVED ASSETS(2)
Long-Lived Assets	[4]	47,557					57,410						47,557		57,410
Other Foreign Countries [Member]
SALES TO UNAFFILIATED CUSTOMERS(1)
Net Sales	[3]												332,443		353,798		$ 347,759
LONG-LIVED ASSETS(2)
Long-Lived Assets	[4]	19,459					20,384						19,459		20,384
NETHERLANDS
LONG-LIVED ASSETS(2)
Long-Lived Assets	[4]	42,808					38,086						42,808		38,086
CHINA
LONG-LIVED ASSETS(2)
Long-Lived Assets	[4]	$ 11,733					$ 14,007						$ 11,733		$ 14,007

[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.

[4] Long-lived assets include tangible assets physically located in foreign countries.