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Note 3 - Cash, Cash Equivalents and Investments (Details) - CD Maturity Dates (USD $)	Jun. 30, 2014	Sep. 30, 2013
CD Maturity Dates [Abstract]
Less than one year	$ 7,027,000	$ 5,992,000
1-3 years	8,643,000	6,770,000
Total	$ 15,670,000	$ 12,762,000

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Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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Carrying amount of debt securities accounted for as held-to-maturity, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments, maturing in the next fiscal year through the fifth fiscal year following the latest fiscal year.

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Carrying amount of debt securities accounted for as held-to-maturity, net of adjustments including, but not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized, and fair value hedge accounting adjustments, maturing in the next fiscal year following the latest fiscal year.

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