Note 3 - Cash, Cash Equivalents and Investments - CD Maturity Dates (Details) - USD ($)	Dec. 31, 2015	Sep. 30, 2015
Less than one year	$ 8,746,000	$ 7,925,000
1-3 years	6,767,000	8,290,000
Total	$ 15,513,000	$ 16,215,000