Note 2 - Summary of Significant Accounting Policies - Intangible Assets (Details) - USD ($)	Sep. 30, 2017	Sep. 30, 2016
Gross intangible	$ 24,475,000	$ 24,629,000
Accumulated amortization	(21,417,000)	(16,676,000)
	3,058,000	7,953,000
Customer Relationships [Member]
Gross intangible	21,950,000	22,104,000
Accumulated amortization	(19,174,000)	(14,938,000)
	2,776,000	7,166,000
Developed Technology Rights [Member]
Gross intangible	2,525,000	2,525,000
Accumulated amortization	(2,243,000)	(1,738,000)
	$ 282,000	$ 787,000