Note 8 - Long-term Investments (Details Textual)	Jun. 30, 2022
New Business Holdings Limited [Member]
Equity Securities without Readily Determinable Fair Value, Percent	15.38%
Guang Dong WeFriend Co., Ltd [Member]
Equity Securities without Readily Determinable Fair Value, Percent	10.00%
Global Best Products [Member]
Equity Securities without Readily Determinable Fair Value, Percent	9.09%
Guangzhou Gong Xiang Technology Co. [Member]
Equity Securities without Readily Determinable Fair Value, Percent	15.00%
Xiao Peng Education [Member]
Equity Securities without Readily Determinable Fair Value, Percent	17.00%
Business Opportunity Chain [Member]
Equity Securities without Readily Determinable Fair Value, Percent	19.00%