Note 5 - Intangible Assets - Schedule of Intangible Assets (Details) (Parentheticals)	6 Months Ended	12 Months Ended
	Mar. 31, 2017	Sep. 30, 2016
Customer Relationships [Member]
Finite-lived intangible asset, useful life (Year)	10 years	10 years
Technology-Based Intangible Assets [Member]
Finite-lived intangible asset, useful life (Year)	7 years	7 years
Trade Names [Member]
Finite-lived intangible asset, useful life (Year)	10 years	10 years
Noncompete Agreements [Member]
Finite-lived intangible asset, useful life (Year)	3 years	3 years