Note 2 - Summary of Significant Accounting Policies - Revenues and Accounts Receivable from Major Distribution Partners and Customers (Details) - Accounts Receivable [Member] - Customer Concentration Risk [Member]	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Major U.S. Retailer A [Member]
Accounts receivable, concentration risk	35.00%	22.00%
Distributor A [Member]
Accounts receivable, concentration risk	33.00%	14.00%
Distributor B [Member]
Accounts receivable, concentration risk	12.00%
Chongqing Pioneer Pharma Holdings Limited [Member]
Accounts receivable, concentration risk		36.00%