Note 11 - Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)	Sep. 24, 2022	Sep. 25, 2021
Inventory differences	$ 1,054,281	$ 1,046,749
Net operating losses	3,407,197	2,789,142
Stock based compensation	138,736	133,173
Tax credits	539,421	516,542
Other	49,617	70,168
Total	5,189,252	4,555,791
Less: valuation allowance	(5,189,252)	(4,555,791)
Total	$ 0	$ 0

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

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory.

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

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other.

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Amount, before allocation of a valuation allowances, of deferred tax assets attributable to deductible tax credit carryforwards including, but not limited to, research, foreign, general business, alternative minimum tax, and other deductible tax credit carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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