Note 8 - Goodwill and Intangible Assets (Tables)

3 Months Ended

Dec. 31, 2019

Notes Tables

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	December 31,			September 30,
	2019			2019
Technology	$	626,587		$	611,043
Customer relationships		599,344			584,477
Trade name portfolio		217,943			212,537
Non-compete agreements		236,105			230,248
Patents		72,126			72,126
		1,752,105			1,710,431
Accumulated amortization		(622,823	)		(534,797	)
	$	1,129,282		$	1,175,634

	Three months ended December 31,
	2019		2018
Amortization expense	$	74,562	$	76,807

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Fiscal year ending September 30:
2020 (remaining nine months)	$	226,197
2021		245,581
2022		222,498
2023		191,342
2024		178,078
Thereafter		65,586
Total estimated amortization expense	$	1,129,282