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Note 15 - Net Loss Per Share - Basic and Diluted Loss Per Share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Numerator:
Net income (loss)	$ 460,908	$ 298,350	$ (1,222,344)	$ (514,329)
Denominator:
Weighted average common shares outstanding - basic and diluted (in shares)	32,275,647	31,800,103	32,212,286	31,800,103
Assumed exercise of dilutive options and warrants (in shares)	1,023,559	63,799
Diluted (in shares)	33,299,206	31,863,902	32,212,286	31,800,103
Net income (loss) per common share - basic and diluted (in dollars per share)	$ 0.01	$ 0.01	$ (0.04)	$ (0.02)
Diluted income (loss) per common share (in dollars per share)	$ 0.01	$ 0.01	$ (0.04)	$ (0.02)
Antidilutive securities (in shares)	1,984,580	3,311,836	2,924,897	3,239,836
Employee Stock Option [Member]
Denominator:
Antidilutive securities (in shares)	1,766,250	3,061,836	2,706,567	2,989,836
Restricted Stock Units (RSUs) [Member]
Denominator:
Antidilutive securities (in shares)	218,330	250,000	218,330	250,000

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