Note 5 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2026	Dec. 31, 2025
Cash and Cash Equivalent	$ 45,115	$ 41,514
Restricted Cash and Cash Equivalent	320	0
Asset, Impairment Loss	0	0
Fair Value, Recurring [Member]
Liabilities, Fair Value Disclosure	0	0
Assets, Fair Value Disclosure	47,204	41,353
Cash Held in Banks [Member]
Cash and Cash Equivalent	220	197
Restricted Cash and Cash Equivalent	20	$ 0
Convertible Promissory Note Receivable [Member] \| Fair Value, Recurring [Member]
Assets, Fair Value Disclosure	$ 1,968

Amount of cash and cash equivalent restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.