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Note 11 - Income (Loss) Per Share - Calculation of Income (Loss) Per Shares (Details) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Jan. 01, 2017
 [1]
Oct. 02, 2016
Jul. 03, 2016
Apr. 03, 2016
Jan. 03, 2016
Oct. 04, 2015
Jul. 05, 2015
Apr. 05, 2015
Jan. 01, 2017
Jan. 03, 2016
Dec. 28, 2014
Net income $ 4,707 $ 15,904 $ 20,657 $ 12,894 $ 18,247 $ 20,127 $ 21,722 $ 12,322 $ 54,162 $ 72,418 $ 24,808
Shares for Basic Earnings Per Share (in shares)                 65,098 66,027 66,389
Dilutive Effect of Stock Options (in shares)                 38 48 59
Shares for Diluted Earnings Per Share (in shares)                 65,136 66,075 66,448
Participating Securities [Member]                      
Net income                 $ 400 $ 1,600 $ 500
Weighted Average Shares Outstanding (in shares)                 64,593 64,557 64,998
Participating Securities (in shares)                 505 1,470 1,391
[1] Results for the fourth quarter of 2016 include restructuring and asset impairment charges of $19.8 million.