Note 8 - Long-term Investments (Details Textual) - USD ($) $ in Thousands		12 Months Ended
May 27, 2024	Dec. 31, 2024	Dec. 31, 2023
Other than Temporary Impairment Losses, Investments		$ 2	$ 433
New Business Holdings Limited [Member]
Equity Securities Without Readily Determinable Fair Value, Percent	7.69%	7.69%
Proceeds from Sale of Equity Method Investments	$ 400
Guangdong Yong Fu Xiang Health Management Co., Ltd (Yong Fu Xiang) [Member]
Equity Securities Without Readily Determinable Fair Value, Percent		9.90%
Wuhan Ju Liang [Member]
Equity Securities Without Readily Determinable Fair Value, Percent		9.90%

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

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- Definition

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

+ References

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

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- Definition

The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-12

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