Note 6 - Earnings (Loss) Per Share - Weighted Average Shares Outstanding (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Preferred Stock Series B Convertible [Member]
Diluted effect:
Diluted effect (in shares)	3,307,299	3,307,299
Convertible Preferred Stock [Member]
Diluted effect:
Diluted effect (in shares)	255,000	255,000
Net income	$ 461,536	$ 533,428
Portion allocable to common shareholders	99.20%	99.20%
Net income allocable to common shareholders	$ 457,844	$ 529,161
Weighted average basic shares outstanding (in shares)	32,020,575	31,906,572
Basic earnings per share (in dollars per share)	$ 0.01	$ 0.02
Net income allocable to common shareholders	$ 457,844	$ 529,161
Add: undistributed earnings allocated to participating securities	3,692	4,267
Numerator for diluted earnings per common share	$ 461,536	$ 533,428
Weighted average basic shares outstanding (in shares)	32,020,575	31,906,572
Stock options (in shares)	21,000	28,000
Diluted effect (in shares)	4,000	15,714
Weighted average dilutive shares outstanding (in shares)	35,607,874	35,512,585
Dilutive earnings per share (in dollars per share)	$ 0.01	$ 0.02