Note 6 - Intangibles - Intangibles (Details) - USD ($)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Accumulated amortization	$ 6,311,000	$ 4,640,000
Finite-lived intangible assets, carrying value	12,276,000
Intangible assets, cost	18,587,000	10,081,000
Intangible assets, carrying value	12,276,000	5,441,000
Brand Name [Member]
Finite-lived intangible assets, cost	1,075,000
Accumulated amortization	282,000
Finite-lived intangible assets, carrying value	$ 793,000
Brand name		710,000
Minimum [Member] | Brand Name [Member]
Estimated useful life (Year)	1 year
Maximum [Member] | Brand Name [Member]
Estimated useful life (Year)	5 years
Customer Relationships [Member]
Finite-lived intangible assets, cost	$ 17,467,000	9,326,000
Accumulated amortization	5,988,000	4,614,000
Finite-lived intangible assets, carrying value	$ 11,479,000	$ 4,712,000
Customer Relationships [Member] | Minimum [Member]
Estimated useful life (Year)	3 years	3 years
Customer Relationships [Member] | Maximum [Member]
Estimated useful life (Year)	10 years	10 years
Software License Arrangement [Member]
Finite-lived intangible assets, cost	$ 45,000	$ 45,000
Accumulated amortization	41,000	26,000
Finite-lived intangible assets, carrying value	$ 4,000	$ 19,000
Estimated useful life (Year)	3 years	3 years