Note 9 - Earnings Per Common Share - Summary of Earnings Per Share Calculation (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net Income	$ 373,752	$ 213,140
Weighted average shares of common stock outstanding - Basic (in shares)	2,911,057	2,877,493
Earnings Per Share - Basic (in dollars per share)	$ 0.13	$ 0.07
Warrants, Options and Convertible Notes (in shares)	358,796	87,236
Weighted average shares of common stock -Diluted (in shares)	3,269,853	2,964,729
Earnings Per Share - Diluted (in dollars per share)	$ 0.11	$ 0.07