Note 2 - Summary of Significant Accounting Policies - Intangible Assets (Details) - USD ($)	Sep. 30, 2016	Sep. 30, 2015
Customer Relationships [Member]
Gross intangible	$ 22,104,000	$ 22,104,000
Accumulated amortization	(14,938,000)	(10,406,000)
	7,166,000	11,698,000
Developed Technology Rights [Member]
Gross intangible	2,525,000	2,525,000
Accumulated amortization	(1,738,000)	(1,233,000)
	787,000	1,292,000
Gross intangible	24,629,000	24,629,000
Accumulated amortization	(16,676,000)	(11,639,000)
	$ 7,953,000	$ 12,990,000