Note 4 - Income Per Share - Weighted Average Shares Outstanding (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net (loss) income allocable to common shareholders	$ 90,307	$ 1,846
Portion allocable to common shareholders	100.00%	99.20%
Net income allocable to common shareholders	$ 90,307	$ 1,831
Weighted average basic shares outstanding (in shares)	35,430,119	32,030,138
Basic (loss) income per common share (in dollars per share)
Add: undistributed earnings allocated to participating securities		$ 15
Numerator for diluted earnings per common share	$ 90,307	$ 1,846
Stock options (in shares)	71,523	14,000
Conversion equivalent of dilutive Series B Convertible Preferred Stock (in shares)		255,000
Weighted average dilutive shares outstanding (in shares)	35,643,392	35,608,255
Dilutive (loss) income per common share (in dollars per share)
Series B Preferred Stock [Member]
Conversion equivalent of dilutive Series B Convertible Preferred Stock (in shares)		3,307,299
Restricted Stock [Member]
Unvested restricted stock (in shares)	141,750	1,818