Note 4 - Income Per Share - Weighted Average Shares Outstanding (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Basic (loss) income per common share (in dollars per share)		$ 0.03		$ 0.03
Net income	$ 76,224	$ 7,987	$ 166,532	$ 9,833
Discount upon exchange of Preferred Stock, net of related fees		1,103,597		1,103,597
	$ 76,224	$ 1,111,584	$ 166,532	$ 1,113,430
Portion allocable to common shareholders	100.00%	99.30%	100.00%	99.30%
Net income available to common shareholders	$ 76,224	$ 1,103,803	$ 166,532	$ 1,105,636
Add: undistributed earnings allocated to participating securities		7,781		7,794
Numerator for diluted earnings per common share	$ 76,224	$ 1,111,584	$ 166,532	$ 1,113,430
Weighted average basic shares outstanding (in shares)	35,528,094	32,419,016	35,091,624	32,224,577
Stock options (in shares)	88,380	7,636	74,317	7,636
Conversion equivalent of dilutive Series B Convertible Preferred Stock (in shares)		212,967		233,984
Weighted average dilutive shares outstanding (in shares)	35,845,082	35,506,914	35,367,136	35,554,403
Dilutive income per common share (in dollars per share)		$ 0.03		$ 0.03
Series B Preferred Stock [Member]
Conversion equivalent of dilutive Series B Convertible Preferred Stock (in shares)		2,865,477		3,086,388
Restricted Stock [Member]
Net income available to common shareholders	$ 76,224	$ 1,103,803	$ 166,532	$ 1,105,636
Unvested restricted stock units (in shares)	228,608	1,818	201,195	1,818