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Leases (Schedule Of Rental Income) (Details) - USD ($) | 3 Months Ended
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Mar. 27, 2021 | Mar. 28, 2020
Rental Income [Abstract] |  |
Base rentals | $ 5,242,199 | $ 9,917,551
Variable rentals | 72,457 | 144,915
Total | 5,314,656 | 10,062,466
Depreciation on owned properties leased to others | (1,319,635) | (2,639,270)
Other shopping center expenses | (775,580) | (1,627,073)
Total | $ 3,219,441 | $ 5,796,123

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