Note 1 - Nature of Operations (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Retained Earnings (Accumulated Deficit)	$ (308,899)	$ (261,903)

Amount of accumulated undistributed earnings (deficit).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant