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Note 6 - Loss Per Common Share - Reconciliation of Weighted Average Shares Outstanding (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2024
Apr. 02, 2023
Net income (loss) income as reported $ (2,221) $ (175)
Less distributed and undistributed earnings allocable to restricted award holders 0 0
Net income (loss) allocable to common stockholders $ (2,221) $ (175)
Basic (in dollars per share) $ (0.1) $ (0.01)
Diluted (in dollars per share) $ (0.1) $ (0.01)
Basic (in shares) 21,965 21,796
Weighted average additional shares assuming conversion of potential common shares (in shares) 0 0
Weighted average shares outstanding – diluted (in shares) 21,965 21,796