Note 3 - Cash, Cash Equivalents and Investments - CD Maturity Dates (Details) - USD ($)	Jun. 30, 2015	Sep. 30, 2014
Less than one year	$ 7,945,000	$ 6,632,000
1-3 years	7,722,000	8,302,000
Total	$ 15,667,000	$ 14,934,000