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Note 17 - Major Customers (Details Textual) - Customer Concentration Risk [Member]	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Sales Revenue, Net [Member] | Customer 1 [Member]
Concentration Risk, Percentage	15.00%	47.00%	22.00%	15.00%
Sales Revenue, Net [Member] | Customer 2 [Member]
Concentration Risk, Percentage	11.00%	13.00%	11.00%	10.00%
Sales Revenue, Net [Member] | Customer 3 [Member]
Concentration Risk, Percentage	10.00%		11.00%
Accounts Receivable [Member] | Customer 1 [Member]
Concentration Risk, Percentage			15.00%	41.00%
Accounts Receivable [Member] | Customer 2 [Member]
Concentration Risk, Percentage			13.00%	25.00%
Accounts Receivable [Member] | Customer 3 [Member]
Concentration Risk, Percentage			12.00%

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13531-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13537-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

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- Details

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- Details

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- Details

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