Investment in Leasing Operations: Credit Losses (Details) - USD ($)	3 Months Ended
Mar. 27, 2021	Mar. 28, 2020	Dec. 26, 2020
Activity in the allowance for credit losses for leasing operations
Balance at beginning of period	$ 270,200	$ 580,600
Provisions charged to expense	(48,700)	615,400
Recoveries		1,500
Balance at end of period	221,500	$ 1,197,500
Investment In Leases
Total investment in direct financing and sales-type leases	10,994,000		$ 13,512,300
Allowance for Credit Losses
Total	221,500		270,200
Investment in leases
Investment In Leases
Collectively evaluated for loss potential	10,994,000		13,512,300
Total investment in direct financing and sales-type leases	10,994,000		13,512,300
Allowance for Credit Losses
Collectively evaluated for loss potential	221,500		270,200
Total	$ 221,500		$ 270,200

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The balance of financing receivables that were collectively evaluated for impairment.

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- Definition

Amount of expense related to estimated loss from loan and lease transactions.

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Allowance for Credit Losses [Abstract]

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For direct financing and sales-type leases, the amount of payments to be received that are probable of not being collected, as of the balance sheet date.

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- Definition

Amount of net recoveries of financing receivables doubtful of collection that were previously charged off.

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The lessor's asset under sales type and direct financing leases. The investment in direct financing and sales-type leases, as of the balance sheet date, consisting of: (a) minimum lease payments due on direct financing leases, (b) unguaranteed residual value, and (c) any unamortized initial direct costs on direct financing leases; less: (i) estimated executory costs, (ii) unearned income, but before deducting the accumulated allowance for uncollectible minimum lease payments.

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Investment in Leases [Abstract]

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