Note 9 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	Jul. 29, 2023	Jul. 03, 2023	Sep. 30, 2023	Dec. 31, 2022
Common Stock, Shares Authorized			150,000,000	150,000,000
Preferred Stock, Shares Authorized			5,000,000	5,000,000
Preferred Stock, Par or Stated Value Per Share			$ 0.0001	$ 0.0001
Common Stock, Par or Stated Value Per Share	$ 0.0001		0.0001	$ 0.0001
Proceeds from Issuance of Convertible Preferred Stock	$ 2,036
Dividends Payable, Amount Per Share (in dollars per share)			$ 193
Series A Preferred Stock [Member] | Registered Direct Offering [Member]
Preferred Stock, Par or Stated Value Per Share	$ 0.0001	$ 0.0001
Stock Issued During Period, Shares, New Issues	10,000	10,000
Preferred Stock, Convertible, Conversion Price	$ 1.45	$ 1.45
Preferred Stock, Dividend Rate, Percentage	8.00%	8.00%
Preferred Stock, Stated Value Per Share	$ 1,000
Preferred Stock, Convertible, Shares Issuable	6,896,553