Amount of accumulated undistributed earnings (deficit).

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

Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	Jun. 30, 2024	Jun. 06, 2024	Dec. 31, 2023
Retained Earnings (Accumulated Deficit)	$ (987,614,000)		$ (939,368,000)
Merger Agreement [Member]
Business Acquisition, Termination Fee		$ 3,600,000
Common Stock [Member] \| Merger Arrangement [Member]
Right to Receive, Price Per Share (in dollars per share)		$ 0.35