Note 14 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands				6 Months Ended
	Jun. 14, 2024	Jun. 08, 2023	Aug. 11, 2022	Dec. 31, 2024	Dec. 31, 2023	Sep. 30, 2024	Sep. 26, 2024	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2022	Jun. 17, 2020
Common Stock, Shares Authorized (in shares)				200,000,000				200,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share)				$ 0.0001				$ 0.0001
Preferred Stock, Shares Authorized (in shares)				50,000,000				50,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)				$ 0.0001				$ 0.0001
Common Stock, Shares, Outstanding (in shares)				6,169,681				5,972,638
Payments of Stock Issuance Costs				$ (0)	$ 160
August 2022 Prefunded Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			87,500
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)			$ 0.02
August 2022 Common Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			1,265,547
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)			$ 8.6						$ 2.32	$ 3.3
Warrants and Rights Outstanding, Term (Year)			5 years
August 2022 Common and Prefunded Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)			1
Sale of Stock, Price Per Share (in dollars per share)			$ 8.58
Warrants and Rights Outstanding, Term (Year)			5 years
Warrants and Rights Outstanding			$ 6,000
Pre-Funded Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		430,217
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)		$ 0.0001	$ 0.02
Tranche A Common Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		2,173,912
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)		$ 3.18
Warrants and Rights Outstanding, Term (Year)		5 years
Tranche B Common Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		2,173,912		1,630,424				1,806,434
Proceeds from Warrant Exercises	$ 3,500
Stock Issued During Period, Shares, Warrants Exercised (in shares)	367,478
Common Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)		$ 1.59
Common Warrants Exchanged for PreFunded Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)		$ 1.5899
Securities Purchase Agreement Warrants [Member]
Warrants and Rights Outstanding		$ 5,000
Payments of Stock Issuance Costs		$ 600
Tranche B Pre-Funded Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	1,806,434					176,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 0.0001					$ 0.0001
Warrants and Rights Outstanding	$ 5,100
Class of Warrant or Right, Issued During Period (in shares)	1,806,434
The 2020 Shelf [Member]
Sale of Stock, Maximum Amount of Equity Issuable											$ 100,000
The August 2022 Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)			1,075,290
Sale of Stock, Price Per Share (in dollars per share)			$ 8.6
Proceeds from Issuance or Sale of Equity			$ 10,000
Payment of Financing and Stock Issuance Costs			$ 900
Securities Purchase Agreement [Member]
Stock Issued During Period, Shares, New Issues (in shares)		1,743,695
Proceeds from Issuance or Sale of Equity		$ 4,000
Payment of Financing and Stock Issuance Costs		$ 3,400
The 2024 Shelf [Member]
Sale of Stock, Maximum Amount of Equity Issuable							$ 100,000
Restricted Stock [Member]
Common Stock, Shares, Outstanding (in shares)				36,256