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Note 7 - Reconciliation of Weighted Average Shares Outstanding Used in Calculation of Basic and Diluted (Loss) Earnings Per Common Share (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jul. 03, 2016
Jul. 05, 2015
Jul. 03, 2016
Jul. 05, 2015
Net loss as reported $ (5,203,000) $ (8,416,000) $ (10,302,000) $ (21,449,000)
Less distributed and undistributed earnings allocable to restricted award holders 0 0 0 0
Less dividends declared attributable to restricted award holders 0 0 0 0
Net loss allocable to common stockholders $ (5,203,000) $ (8,416,000) $ (10,302,000) $ (21,449,000)
Basic (in dollars per share) $ (0.26) $ (0.43) $ (0.52) $ (1.09)
Diluted (in dollars per share) $ (0.26) $ (0.43) $ (0.52) $ (1.09)
Weighted average shares outstanding – basic (in shares) 19,749,000 19,701,000 19,725,000 19,675,000
Weighted average additional shares assuming conversion of potential common shares (in shares) 0 0 0 0
Weighted average shares outstanding – diluted (in shares) 19,749,000 19,701,000 19,725,000 19,675,000