Note 17 - Commitments and Contingencies (Details Textual) ¥ in Thousands, $ in Thousands	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2023 CNY (¥)
Equity Securities without Readily Determinable Fair Value, Amount	$ 397	$ 397
Wuhan Ju Liang [Member]
Equity Securities Without Readily Determinable Fair Value, Percent	9.90%		9.90%	9.90%
Equity Securities without Readily Determinable Fair Value, Amount			$ 140	¥ 990

Amount of investment in equity security without readily determinable fair value.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 321
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479536/321-10-50-3

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant