Note 3 - Cash, Cash Equivalents and Investments (Details) - CD Maturity Dates (USD $)	Jun. 30, 2013	Sep. 30, 2012
CD Maturity Dates [Abstract]
Less than one year	$ 8,039,000	$ 9,107,000
1-3 years	5,641,000	4,572,000
Total	$ 13,680,000	$ 13,679,000