Note 14 - Income Taxes (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended
	Feb. 03, 2022	Feb. 07, 2019	Dec. 31, 2024	Dec. 31, 2023
Income Tax Expense (Benefit)			$ 74	$ 241
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount			1,278	1,957
Deferred Tax Assets, Valuation Allowance			77,794	$ 76,516
Operating Loss Carryforwards			295,198
Operating Loss Carryforwards, Subject to Expiration			227,781
Operating Loss Carry Forwards Annual Limit			$ 14,284
Rights [Member]
Term of Extended Rights Plan (Year)	3 years	3 years
Threshold Percentage of Beneficial Ownership for Significant Dilution in Ownership Interest			4.90%
Class of Warrant or Right Number of Rights Per Common Stock Share			1
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)			0.001
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)			$ 7.7
Class of Warrant or Right Current Beneficial Ownership Percentage That Will Not Trigger Preferred Share Purchase Rights			4.90%