Note 13 - Earnings Per Share - Basic and Diluted Earnings Per Share (Details) - USD ($)	3 Months Ended												12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Loss from continuing operations	$ (1,203,311)	$ (1,211,158)	$ (58,196)	$ (1,562,434)	$ (886,775)	$ (761,380)	$ (348,713)	$ (3,786,829)	$ (598,562)	$ (418,360)	$ (565,985)	$ (872,838)	$ (4,035,099)	$ (5,783,697)	$ (2,455,745)
Discontinued operations, net of tax													(1,267,344)	(1,536,159)	2,357,629
Net loss attributable to common shareholders													$ (5,302,443)	$ (7,319,856)	$ (98,116)
Basic weighted average shares (in shares)													10,361,292	10,272,749	10,201,825
Stock options (in shares)
Diluted weighted average shares (in shares)													10,361,292	10,272,749	10,201,825
Continuing operations (in dollars per share)	$ (0.12)	$ (0.12)	$ 0	$ (0.15)	$ (0.09)	$ (0.07)	$ (0.03)	$ (0.37)	$ (0.06)	$ (0.04)	$ (0.06)	$ (0.08)	$ (0.39)	$ (0.56)	$ (0.24)
Discontinued operations (in dollars per share)	$ (0.12)	$ (0.12)	$ 0	$ (0.15)	$ (0.09)	$ (0.07)	$ (0.03)	$ (0.37)	$ (0.06)	$ (0.04)	$ (0.06)	$ (0.08)	(0.12)	(0.15)	0.23
Net loss (in dollars per share)													(0.51)	(0.71)	(0.01)
Continuing operations (in dollars per share)													(0.39)	(0.56)	(0.24)
Discontinued operations (in dollars per share)													(0.12)	(0.15)	0.23
Net loss (in dollars per share)													$ (0.51)	$ (0.71)	$ (0.01)