Note 14 - Concentration of Credit Risk (Details Textual) $ in Millions	Sep. 30, 2025 USD ($)
Cash Held With Three Commercial Banks [Member]
Cash, Uninsured Amount	$ 5.4
Money Market Funds [Member]
Cash, Uninsured Amount	$ 66.5

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