Note 4 - Net Earnings (Loss) Per Share - Earnings Per Share Numerator and Denominator (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Numerator:
Numerator for basic and diluted earnings per share, net income (loss) available to common shareholders	$ (286,583)	$ (32,002)
Denominator:
Denominator for basic earnings per share, weighted average shares outstanding (in shares)	8,485,183	7,719,248
Effect of dilutive securities (in shares)
Denominator for diluted earnings per share, adjusted weighted average shares and assumed conversion (in shares)	8,485,183	7,719,248
Basic earnings (loss) per common share (in dollars per share)	$ (0.03)	$ 0
Diluted earnings (loss) per common share and common share equivalent (in dollars per share)	$ (0.03)	$ 0