Note 1 - Organization, Principal Activities and Basis of Presentation (Details Textual) $ in Thousands			3 Months Ended		9 Months Ended
	Sep. 11, 2024	Apr. 09, 2024	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Retained Earnings (Accumulated Deficit)			$ (126,824)		$ (126,824)		$ (118,966)
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest			(2,806)	$ (11,967)	(7,858)	$ (17,443)
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation					(11,577)	$ (14,146)
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation			$ 16,900		16,900
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	30	20
Approximation [Member]
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest					$ (7,700)