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Note 6 - Income (Loss) Per Common Share - Reconciliation of Weighted Average Shares Outstanding Used in Calculation of Basic and Diluted (Loss) Earnings Per Common Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Oct. 02, 2022
Oct. 03, 2021
Oct. 02, 2022
Oct. 03, 2021
Net (loss) income $ (2,242) $ 294 $ (2,634) $ 2,487
Less distributed and undistributed earnings allocable to restricted award holders 0 (2) 0 (7)
Less dividends declared attributable to restricted award holders 0 0 0 0
Net (loss) income allocable to common stockholders $ (2,242) $ 292 $ (2,634) $ 2,480
Basic (in dollars per share) $ (0.10) $ 0.01 $ (0.12) $ 0.12
Diluted (in dollars per share) $ (0.10) $ 0.01 $ (0.12) $ 0.11
Basic (in shares) 21,740 21,536 21,716 21,522
Weighted average additional shares assuming conversion of potential common shares (in shares) 0 1,404 0 1,472
Weighted average shares outstanding – diluted (in shares) 21,740 22,940 21,716 22,994