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Note 9 - Income Taxes - Components of Net Deferred Tax Assets (Details) - USD ($)	Dec. 25, 2021	Dec. 26, 2020	Dec. 28, 2019
Deferred Tax Assets:
Net operating loss carryforwards	$ 1,050,449	$ 746,397
Stock compensation	157,845	540,281
Credit carryforwards	1,285,119	1,288,897
Inventory	77,563	116,153
Accrued liabilities	12,390	22,140
Depreciation	237,880	250,093
Other	2,732	2,732
Gross deferred tax assets	2,823,978	2,966,693	$ 3,321,611
Valuation allowance	0	(2,849,693)
Net deferred tax assets	$ 2,823,978	$ 117,000

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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