Note 8 - Long-term Investments (Details Textual)	Mar. 31, 2025
New Business Holdings Limited [Member]
Equity Securities Without Readily Determinable Fair Value, Percent	7.69%
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%