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Note 16 - Net Income (Loss) Per Share - Basic and Diluted Loss Per Share (Details) - USD ($)	3 Months Ended						9 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2019	Jun. 30, 2018
Net income (loss)	$ 638,041	$ 1,178,850	$ 1,045,940	$ (80,219)	$ 460,908	$ (1,683,252)	$ 2,862,831	$ (1,302,564)
Basic (in dollars per share)	$ 0.02			$ 0			$ 0.09	$ (0.04)
Diluted (in dollars per share)	$ 0.02			$ 0			$ 0.09	$ (0.04)
Weighted average shares outstanding - basic (in shares)	32,575,118			32,306,207			32,684,311	32,314,038
Assumed exercise of dilutive options (in shares)	797,659						656,746
Weighted average shares outstanding - diluted (in shares)	33,372,777			32,306,207			33,341,057	32,314,038
Antidilutive securities (in shares)	761,250			1,984,580			976,750	2,924,897
Share-based Payment Arrangement, Option [Member]
Antidilutive securities (in shares)	761,250			1,766,250			976,750	2,706,567
Restricted Stock Units (RSUs) [Member]
Antidilutive securities (in shares)				218,330				218,330

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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