Note 6 - Segment Information - Schedule of Long-lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Noncurrent assets	$ 481	$ 600
UNITED STATES
Noncurrent assets	68	72
SWEDEN
Noncurrent assets	$ 413	$ 528

Amount of long-lived asset, excluding financial instrument, long-term customer relationship of financial institution, mortgage and other servicing rights, deferred policy acquisition cost, and deferred tax asset.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-41

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