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Shareholders' Equity (Deficit): Additional Information (Details) - Stock options - USD ($) | 12 Months Ended
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Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017
Additional disclosures |  |  |
Total intrinsic value of options exercised | $ 22,700,000 | $ 8,300,000 | $ 7,700,000
Total fair value of shares vested | $ 8,600,000 | $ 7,800,000 | $ 7,300,000
Shares of previously owned common stock surrendered as payment for option shares exercised | 0 | 2,249 | 2,927
Compensation expense | $ 1,666,400 | $ 1,976,100 | $ 1,956,600
Total unrecognized compensation expense | $ 3,700,000 |  |
Weighted average period for recognition of unrecognized compensation expense | 2 years 7 months 6 days |  |

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