Note 9 - Interest Dividend and Other Income - Summary of Other Income (Details) - USD ($)	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Interest and dividend income	$ 329,000	$ 199,000
Realized gain		25,000
Unrealized gain (loss)	10,000	(29,000)
Other	1,000	39,000
	$ 340,000	$ 234,000