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Income Taxes: Reconciliation, Components and Deferred Taxes (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 28, 2024 | Dec. 30, 2023 | Dec. 31, 2022
Income Taxes: |  |  |
Federal statutory tax rate (as a percent) | 21.00% | 21.00% | 21.00%
Reconciliation of the expected federal income tax expense based on the federal statutory tax rate to the actual income tax expense |  |  |
Federal income tax expense at statutory rate (21%, 21%, 21%) | $ 10,757,000 | $ 10,785,900 | $ 10,664,500
Change in valuation allowance | 180,000 | (551,600) | (6,600)
State and local income taxes, net of federal benefit | 1,435,800 | 1,513,100 | 1,515,900
Permanent differences, including stock option expenses | (1,479,400) | (1,372,300) | (955,900)
Expiration of attributes |  | 528,600 |
Adjustment to uncertain tax positions | 258,500 | 240,100 | 185,300
Other, net | 117,900 | 39,400 | (44,600)
Total provision for income taxes | 11,269,800 | 11,183,200 | 11,358,600
Current provision for income taxes: |  |  |
Federal | 8,840,600 | 9,237,600 | 8,892,200
State | 2,025,500 | 1,883,900 | 2,167,900
Foreign | 563,000 | 573,800 | 586,200
Current provision | 11,429,100 | 11,695,300 | 11,646,300
Deferred provision for income taxes: |  |  |
Federal | (108,900) | (504,700) | (351,500)
State | (50,400) | (7,400) | 63,800
Deferred provision | (159,300) | (512,100) | (287,700)
Total provision for income taxes | 11,269,800 | 11,183,200 | $ 11,358,600
Deferred tax assets: |  |  |
Accounts receivable and lease reserves | 100 | 500 |
Non-qualified stock option expense | 1,942,000 | 1,769,200 |
Deferred revenue | 1,728,100 | 1,612,200 |
Trademarks | 40,200 | 36,900 |
Lease deposits |  | 6,700 |
Lease revenue and initial direct costs | 21,300 | 29,200 |
Foreign tax credits | 597,300 | 631,100 |
Valuation allowance | (530,000) | (350,000) |
Operating lease liabilities | 884,500 | 1,026,600 |
Other | 348,300 | 291,100 |
Total deferred tax assets | 5,031,800 | 5,053,500 |
Deferred tax liabilities: |  |  |
Depreciation and amortization | (820,000) | (1,001,100) |
Total deferred tax liabilities | (820,000) | (1,001,100) |
Total net deferred tax assets | $ 4,211,800 | $ 4,052,400 |

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- Definition Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying statutory federal (national) tax rate to pretax income (loss) from continuing operation attributable to other reconciling item. Excludes state and local income tax expense (benefit), federal tax expense (benefit), statutory income tax expense (benefit) outside of country of domicile, tax credit, nondeductible expense, deduction, income tax settlement, income tax contingency, and cross-border tax law. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit). + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 231 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-231 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12A -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12A Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 + Details
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