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Income Taxes: Reconciliation, Components and Deferred Taxes (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017
Income Taxes: |  |  |
Federal statutory tax rate (as a percent) | 21.00% | 21.00% | 35.00%
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%, 35%) | $ 8,708,200 | $ 8,249,400 | $ 12,758,000
Change in valuation allowance | 147,900 | (13,800) | 7,500
State and local income taxes, net of federal benefit | 1,310,800 | 1,334,100 | 1,057,100
Permanent differences, including stock option expenses | (1,056,800) | (355,500) | (628,400)
Adjustment to uncertain tax positions | (58,500) | 4,500 | 77,800
Rate change |  |  | (1,540,300)
Other, net | 266,500 | (61,100) | 139,300
Total provision for income taxes | 9,318,100 | 9,157,600 | 11,871,000
Current provision for income taxes: |  |  |
Federal | 9,076,400 | 6,355,800 | 10,296,100
State | 1,693,800 | 1,551,000 | 1,688,100
Foreign | 363,200 | 423,000 | 365,900
Current provision | 11,133,400 | 8,329,800 | 12,350,100
Deferred provision for income taxes: |  |  |
Federal | (1,834,800) | 967,300 | (463,800)
State | 19,500 | (139,500) | (15,300)
Deferred provision | (1,815,300) | 827,800 | (479,100)
Total provision for income taxes | 9,318,100 | 9,157,600 | $ 11,871,000
Deferred tax assets: |  |  |
Accounts receivable and lease reserves | 154,700 | 215,900 |
Non-qualified stock option expense | 1,758,100 | 2,071,600 |
Deferred revenue | 1,957,500 | 2,020,100 |
Trademarks | 34,500 | 39,800 |
Lease deposits | 930,700 | 1,004,700 |
Loss from and impairment of equity and note investments | 2,595,500 | 2,620,700 |
Foreign tax credits | 173,100 |  |
Valuation allowance | (2,768,600) | (2,620,700) |
Other | 194,400 | 331,400 |
Total deferred tax assets | 5,029,900 | 5,683,500 |
Deferred tax liabilities: |  |  |
Lease revenue and initial direct costs | (4,207,400) | (6,664,800) |
Depreciation and amortization | (155,500) | (167,000) |
Total deferred tax liabilities | (4,362,900) | (6,831,800) |
Total net deferred tax liabilities |  | $ (1,148,300) |
Total net deferred tax liabilities | $ 667,000 |  |

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