Operating Leases: Maturities and other (Details) - USD ($)	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Maturities of operating lease liabilities:
2020	$ 704,300
2021	783,600
2022	784,400
2023	763,300
2024	784,400
Thereafter	4,258,600
Total	8,078,600
Less imputed interest	(1,863,100)
Present value of lease liabilities	6,215,500
Operating lease liability
Operating lease liability, current	$ 400,000
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued Liabilities, Current
Total deferred rent		$ 300,000
Deferred rent included in other liabilities		$ 200,000
Other disclosures
Tenant allowance recorded during the year as a reduction to the operating lease right of use asset	$ 2,100,000
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flow outflow from operating leases	$ 493,900