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Note 6 - (Loss) Income Per Common Share - Reconciliation of Weighted Average Shares Outstanding (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Apr. 02, 2023
Apr. 03, 2022
Net (loss) income $ (175) $ 237
Less distributed and undistributed earnings allocable to restricted awarded holders 0 (2)
Net (loss) income allocable to common stockholders $ (175) $ 235
Basic (in dollars per share) $ (0.01) $ 0.01
Diluted (in dollars per share) $ (0.01) $ 0.01
Basic (in shares) 21,796 21,681
Weighted average additional shares assuming conversion of potential common shares (in shares) 0 994
Weighted average shares outstanding – diluted (in shares) 21,796 22,675