Note 1 - Organization, Business and Financial Condition (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Disclosure Text Block [Abstract]
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, Dividend Rate, Percentage	4.50%
Retained earnings (Accumulated deficit), ending balance	$ (129,100)
Cash and cash equivalents	$ 11,353	$ 12,432	$ 16,403