Note 1 - Organization and Summary of Significant Accounting Policies - Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Accounts receivable, net of allowance of $627 and $756	$ 10	$ 1

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

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