(8) Income Taxes - Deferred tax assets (Details) - USD ($)	Dec. 29, 2018	Dec. 30, 2017
Deferred Tax Assets:
Net operating loss carryforwards	$ 738,213	$ 634,000
Stock compensation	524,893	478,000
Credit carryforwards	1,365,068	1,494,000
Inventory	281,192	235,000
Accrued liabilities	21,615	20,000
Depreciation	215,936	175,000
Other	3,238	3,000
Gross deferred tax assets	3,150,155	3,039,000
Valuation allowance	2,963,155
Net deferred tax assets	$ 187,000	$ 3,039,000