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Note 6 - Earnings (Loss) Per Common Share - Reconciliation of Weighted Average Shares Outstanding (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 30, 2025
Mar. 31, 2024
Net loss as reported $ (899) $ (2,221)
Less distributed and undistributed earnings allocable to restricted award holders 0 0
Net income (loss) allocable to common stockholders $ (899) $ (2,221)
Basic (in dollars per share) $ (0.04) $ (0.1)
Diluted (in dollars per share) $ (0.04) $ (0.1)
Basic (in shares) 22,140 21,965
Weighted average additional shares assuming conversion of potential common shares (in shares) 0 0
Weighted average shares outstanding – diluted (in shares) 22,140 21,965