Note 4 - Balance Sheet Components (Details Textual) - USD ($)	12 Months Ended
Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018
Depreciation, Amortization and Accretion, Net, Total	$ 817,000	$ 1,201,000	$ 1,276,000
Interest Costs Capitalized	0	0	$ 0
Capitalized Computer Software, Amortization	$ 148,000	$ 32,000

Amount of expense for amortization of capitalized computer software costs.

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The aggregate net amount of depreciation, amortization, and accretion recognized during an accounting period. As a noncash item, the net amount is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of interest capitalized during the period.

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