Note 6 - Cash and Cash Equivalents (Details Textual) - USD ($)	Jun. 30, 2025	Dec. 31, 2024
Cash, Uninsured Amount	$ 397,000	$ 234,000
Cash, SIPC Uninsured Amount	$ 639,000	$ 563,000

The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation.

No definition available.

Name:	us-gaap_CashUninsuredAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant