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Shareholders' Equity (Deficit): (Tables) | 12 Months Ended
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Dec. 28, 2024
Shareholders' Equity (Deficit): |
Schedule of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | Weighted Average |  | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Remaining | ​ | ​ | ​
​ | ​ | Number of | ​ | Weighted Average | ​ | Contractual Life | ​ | ​ | ​
​ | ​ | Shares | ​ | Exercise Price | ​ | (years) | ​ | Intrinsic Value
Outstanding, December 25, 2021 |  | 355,621 | ​ | $ | 146.03 |  | ​ | ​ | ​ | ​
Granted |  | 62,540 | ​ | ​ | 217.03 | ​ | ​ | ​ | ​ | ​
Exercised |  | (50,032) | ​ | ​ | 94.97 | ​ | ​ | ​ | ​ | ​
Forfeited | ​ | (6,501) | ​ | ​ | 183.28 | ​ | ​ | ​ | ​ | ​
Outstanding, December 31, 2022 |  | 361,628 | ​ | ​ | 164.70 |  | ​ | ​ | ​ | ​
Granted |  | 21,320 | ​ | ​ | 328.68 | ​ | ​ | ​ | ​ | ​
Exercised |  | (37,304) | ​ | ​ | 107.49 | ​ | ​ | ​ | ​ | ​
Forfeited | ​ | (3,752) | ​ | ​ | 204.26 | ​ | ​ | ​ | ​ | ​
Outstanding, December 30, 2023 |  | 341,892 | ​ | ​ | 180.73 | ​ | ​ | ​ | ​ | ​
Granted |  | 25,300 | ​ | ​ | 377.63 | ​ | ​ | ​ | ​ | ​
Exercised |  | (42,767) | ​ | ​ | 117.70 | ​ | ​ | ​ | ​ | ​
Forfeited |  | (4,581) | ​ | ​ | 239.61 | ​ | ​ | ​ | ​ | ​
Outstanding, December 28, 2024 |  | 319,844 | ​ | $ | 203.89 | ​ | 5.72 | ​ | $ | 61,841,500
Exercisable, December 28, 2024 |  | 233,931 | ​ | $ | 173.68 | ​ | 4.82 | ​ | $ | 52,073,200
Schedule of weighted average assumptions used in estimation of fair value of options granted | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended |
​ |  | December 28, 2024 | ​ | December 30, 2023 |  | December 31, 2022 |
Risk free interest rate |  | ​ | 4.34 | % | ​ | 3.88 | % | ​ | 3.15 | %
Expected life (years) |  | ​ | 6 | ​ | ​ | 6 | ​ | ​ | 6 | ​
Expected volatility |  | ​ | 29.13 | % | ​ | 28.10 | % | ​ | 27.58 | %
Dividend yield |  | ​ | 2.84 | % | ​ | 2.94 | % | ​ | 4.29 | %
Option fair value | ​ | $ | 98.64 | ​ | $ | 79.88 | ​ | $ | 40.59 | ​

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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