Note 7 - Capital Stock (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		6 Months Ended
	Mar. 21, 2023	Jul. 02, 2023	Jul. 03, 2022
Proceeds from Issuance of Common Stock		$ 2,313	$ 0
Registered Direct Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)	450
Proceeds from Issuance of Common Stock	$ 2,300
Shares Issued, Price Per Share (in dollars per share)	$ 5.14