Note 7 - Share-based Compensation - Stock-based Compensation Expense (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Stock-based compensation expense	$ 1,279,536	$ 643,570
Cost of Sales [Member]
Stock-based compensation expense	77,336	21,088
Research and Development Expense [Member]
Stock-based compensation expense	319,258	181,792
Selling and Marketing Expense [Member]
Stock-based compensation expense	218,407	108,318
General and Administrative Expense [Member]
Stock-based compensation expense	$ 664,535	$ 332,372