Note 11 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended
	Oct. 18, 2022	Oct. 17, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 28, 2021	Dec. 27, 2021	Nov. 16, 2020	Aug. 29, 2011
Common Stock, Shares Authorized (in shares)			30,000,000	30,000,000	30,000,000	10,000,000
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased (in shares)								540,000
Treasury Stock, Shares, Acquired (in shares)			0	0
Treasury Stock, Common, Shares (in shares)			81,584	81,584
Treasury Stock, Common, Value			$ 580	$ 580
European Style Warrants [Member]
Class of Warrant or Right, Outstanding (in shares)							5,258,320
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 4.75	$ 12.5
Warrants, Target Trigger Price for Potential Acceleration of Exercise Date (in dollars per share)	$ 6.65	$ 17.5
Proceeds from Warrant Exercises	$ 4,995