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Note 9 - Earnings (Loss) Per Common Share - Reconciliation of Weighted Average Shares Outstanding Used in Calculation of Basic and Diluted (Loss) Earnings Per Common Share (Details) - USD ($)
 3 Months Ended 9 Months Ended
Oct. 04, 2015
Sep. 28, 2014
Oct. 04, 2015
Sep. 28, 2014
(Loss) income attributable to stockholders:        
Net (loss) income as reported $ (274,000) $ (1,159,000) $ (21,723,000) $ 863,000
Less dividends declared attributable to restricted award holders 0 (15,000) 0 (46,000)
Net (loss) income allocable to common stockholders $ (274,000) $ (1,174,000) $ (21,723,000) $ 817,000
(Loss) income per share:        
Basic (in dollars per share) $ (0.01) $ (0.06) $ (1.10) $ 0.04
Diluted (in dollars per share) $ (0.01) $ (0.06) $ (1.10) $ 0.04
Basic (in shares) 19,654,000 19,612,000 19,684,000 19,564,000
Weighted average additional shares assuming conversion of potential common shares (in shares) 0 0 0 43,000
Weighted average shares outstanding – diluted (in shares) 19,654,000 19,612,000 19,684,000 19,607,000