Note 1 - The Company and Basis of Presentation (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands			9 Months Ended
	Mar. 13, 2024	Mar. 21, 2023	Sep. 29, 2024	Oct. 01, 2023		Jun. 27, 2024	Feb. 29, 2024	Dec. 31, 2023	Jun. 28, 2023	Apr. 28, 2023	Jan. 01, 2023	[1]
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents			$ 22,364	$ 18,625	[1]		$ 22,400	$ 24,606			$ 19,201
Line of Credit, Current			20,000					$ 20,000
Proceeds from Issuance of Common Stock, Net			$ 3,500
Common Stock, Par or Stated Value Per Share (in dollars per share)			$ 0.001					$ 0.001
Proceeds from Issuance of Common Stock			$ 3,560	$ 2,313	[1]
Financing Receivable, after Allowance for Credit Loss, Noncurrent			1,260					$ 0
The Note [Member]
Financing Receivable, after Allowance for Credit Loss, Noncurrent										$ 1,160
Financing Receivable, Interest Rate						10.00%			4.69%	3.00%
Financing Receivable, Effective Annual Interest Rate									4.80%
Financing Receivable Term (Month)						24 months
Financing Receivable, Default Interest Rate						15.31%
Financing Receivable, after Allowance for Credit Loss			1,260
Financing Receivable, Accrued Interest, after Allowance for Credit Loss			97
Registered Direct Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)	223	450
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.001
Proceeds from Issuance of Common Stock	$ 3,500	$ 2,300
Shares Issued, Price Per Share (in dollars per share)	$ 16	$ 5.14
Asset Pledged as Collateral [Member]
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents			100
Revolving Credit Facility [Member] | Heritage Bank of Commerce [Member]
Line of Credit, Current			$ 20,000					$ 20,000
Debt Instrument, Interest Rate, Effective Percentage			8.50%	9.00%				9.00%

[1] As revised. Refer to Note 2 for further information.