Note 12 - Basic and Diluted Earnings Per Share (Details) - USD ($)	3 Months Ended		6 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Equity Option [Member]
Potentially dilutive securities outstanding at period end excluded from the diluted computation as the inclusion would have been antidilutive:
Potentially dilutive securities (in shares)			2,348,083	1,405,250	2,895,669	1,405,250
Warrant [Member]
Potentially dilutive securities outstanding at period end excluded from the diluted computation as the inclusion would have been antidilutive:
Potentially dilutive securities (in shares)				1,627,945		1,627,945
Income (loss) available to common stockholders			$ 276,922	$ (63,947)	$ (767,814)	$ 732,198
Weighted average common shares outstanding (in shares)	31,798,853	33,152,714	31,798,853	33,152,714	32,028,153	33,214,242
Assumed exercise of dilutive options and warrants (in shares)			62,455			524,374
Weighted average dilutive shares outstanding (in shares)	31,861,308	33,152,714	31,861,308	33,152,714	32,028,153	33,738,616
Basic income (loss) per common share (in dollars per share)			$ 0.01	$ 0	$ (0.02)	$ 0.02
Diluted income (loss) per common share (in dollars per share)			$ 0.01	$ 0	$ (0.02)	$ 0.02
Potentially dilutive securities (in shares)			2,348,083	3,033,195	2,895,669	3,033,195