Income Taxes: Other (Details) - USD ($)	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022
Deferred tax assets, valuation allowance
Valuation allowance	$ 350,000	$ 901,600
Unrecognized Tax Benefits
Unrecognized tax benefits, including interest and penalties	1,345,000	1,050,300
Interest and penalties accrued related to unrecognized tax benefit	261,900	179,000
Activity related to the company's unrecognized tax benefits
Balance at the beginning of the period	871,300	677,200
Increases related to current year tax positions	277,600	266,800
Subtractions for tax positions of prior years	(65,800)
Expiration of the statute of limitations for the assessment of taxes		(72,700)
Balance at the end of the period	$ 1,083,100	$ 871,300
Period over which various statutes of limitations are expected to expire	12 months