Note 8 - Basic and Diluted Net Income (Loss) Per Share (Details Textual) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Weighted Average Number of Shares Outstanding, Basic, Total (in shares)	3,899,431	3,899,431	3,899,431	3,899,000
Weighted Average Number of Shares Outstanding, Basic, Total (in shares)	3,899,431	3,899,431	3,899,431	3,899,000
Weighted Average Number of Shares Outstanding, Diluted, Total (in shares)	3,921,656	3,928,971	3,899,000	3,936,854
Weighted Average Number of Shares Outstanding, Assuming Dilution (in shares)			3,923,213