Debt: Maturities (Details)	Dec. 26, 2020 USD ($)
Required prepayments of the notes payable for each of the next five years and thereafter
2021	$ 4,250,000
2022	4,250,000
2023	4,250,000
2024	4,250,000
2025	2,750,000
Thereafter	2,187,500
Total	$ 21,937,500

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
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