Note 7 - Intangible Assets - Summary of Intangible Assets (Details) - USD ($)	Dec. 31, 2017	Sep. 30, 2017
Gross intangibles	$ 24,475,000	$ 24,475,000
Accumulated amortization	(22,479,000)	(21,417,000)
	1,996,000	3,058,000
Customer Relationships [Member]
Gross intangibles	21,950,000	21,950,000
Accumulated amortization	(20,130,000)	(19,174,000)
	1,820,000	2,776,000
Developed Technology Rights [Member]
Gross intangibles	2,525,000	2,525,000
Accumulated amortization	(2,349,000)	(2,243,000)
	$ 176,000	$ 282,000

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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