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Accrued Liabilities: (Details) - USD ($)
Dec. 28, 2024
Dec. 30, 2023
Accrued Liabilities:    
Accrued compensation and benefits $ 592,900 $ 587,700
Operating lease liability $ 641,900 $ 590,200
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Accrued liabilities Accrued liabilities
Accrued interest $ 167,700 $ 244,200
Accrued purchases of goods and services 239,900 637,000
Other 223,800 799,100
Accrued liabilities $ 1,866,200 $ 2,858,200