Note 9 - Income Taxes - Summary of Changes in Deferred Tax Asset (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021
Gross deferred tax balance at beginning of year	$ 2,823,978	$ 2,966,693
Deferred tax benefit (provision)	(754,542)	(142,715)
Valuation allowance	0	0
Balance at end of year, net	$ 2,069,436	$ 2,823,978