Note 6 - Basic and Diluted Net Income (Loss) Per Share (Details Textual) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Weighted Average Number of Shares Outstanding, Basic			3,803,331	3,803,331
Weighted Average Number of Shares Outstanding, Diluted	3,826,920	3,811,391	3,803,000	3,803,000
Weighted Average Number of Shares Outstanding, Assuming Dilution			3,858,828	3,807,362