Note 10 - Related Party Transactions (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	Jul. 03, 2024	May 31, 2023	Apr. 30, 2023	Jun. 09, 2022	May 31, 2022	Dec. 31, 2024	Sep. 30, 2024	Mar. 28, 2024	Dec. 31, 2023	Sep. 20, 2022
Accrued Liabilities, Current						$ 7,027			$ 3,814
Common Stock, Par or Stated Value Per Share (in dollars per share)						$ 0.001			$ 0.001
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)						$ 11			0
Loan Agreement [Member]
Debt Instrument, Decrease, Forgiveness			$ 65,000
Interest Payable			$ 200
Rights Offering Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)				1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)				$ 2.05					$ 2.05
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)				7,317,072					7,317,072
Warrants Issued in 2024 Rights Offering [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)	0.5							0.5
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 11
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	5,999,999
Warrants Issued in 2024 Rights Offering [Member] | Maximum [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	6,000,000
Rights Offering [Member]
Equity Offering, Units, Sale of Units (in shares)				7,317,072
Shares Issued, Price Per Share (in dollars per share)				$ 2.05
Number of Shares Per Unit Issued (in shares)				1
Common Stock, Par or Stated Value Per Share (in dollars per share)				$ 0.001
Number of Warrants Per Unit (in shares)				1
Stock Issued During Period, Shares, New Issues (in shares)				7,317,072
Proceeds from Issuance or Sale of Equity				$ 15,000
The 2024 Right Offering [Member]
Shares Issued, Price Per Share (in dollars per share)	$ 10							$ 10
Number of Shares Per Unit Issued (in shares)	1							1
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.001							$ 0.001
Stock Issued During Period, Shares, New Issues (in shares)	5,999,998
Equity Offering, Units, Maximum Amount Authorized (in shares)	6,000,000							6,000,000
Number of Warrants in Each Unit (in shares)	2							2
Proceeds from Issuance or Sale of Equity	$ 60,000
Majority Stockholder and Co-chairman [Member] | Loan Agreement [Member]
Debt Instrument, Face Amount										$ 65,000
Majority Stockholder and Co-chairman [Member] | Rights Offering [Member]
Investment Owned, Net Assets, Percentage				56.00%
Majority Stockholder and Co-chairman [Member] | Private Placement [Member]
Shares Issued, Price Per Share (in dollars per share)			$ 6.51
Common Stock, Par or Stated Value Per Share (in dollars per share)			$ 0.001
Stock Issued During Period, Shares, New Issues (in shares)			10,022,937
Majority Stockholder and Co-chairman [Member] | The 2024 Right Offering [Member]
Percent of Offering Purchased	88.00%
Letter Agreement [Member] | Majority Stockholder and Co-chairman [Member]
Directors and Officers Liability Insurance, Period (Year)					1 year
Related Party Transaction, Amounts of Transaction		$ 1,000
Accrued Liabilities, Current							$ 0