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Note 12 - Treasury Stock Transactions (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Sep. 25, 2020 | Jun. 02, 2020 | Jun. 27, 2020 | Sep. 26, 2020 | Sep. 29, 2019 | Sep. 28, 2019
Treasury Stock, Shares, Acquired (in shares) |  | 1,858,139 |  |  |  |
Treasury Stock Acquired, Average Cost Per Share (in dollars per share) |  | $ 1.20 |  |  |  |
Treasury Stock, Value, Acquired, Cost Method |  | $ 2,200 | $ 2,230 |  |  |
Repayments of Subordinated Debt, Total |  |  |  | $ 2,230 |  |
Stock Repurchase Program, 2016 [Member] |  |  |  |  |  |
Treasury Stock, Shares, Acquired (in shares) |  |  |  |  | 0 |
Note Issued to Acquire Treasury Stock [Member] |  |  |  |  |  |
Notes Issued |  | $ 2,200 |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 9.00% |  |  |  |
Repayments of Subordinated Debt, Total | $ 2,200 |  |  |  |  |
Debt Instrument, Maturity Date |  | Aug. 10, 2023 |  |  |  |

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