Note 7 - Receivables from Broker Dealers and Clearing Organizations and Other Receivables (Details Textual) - USD ($)	Sep. 30, 2020	Sep. 30, 2019
Receivables from Brokers-Dealers and Clearing Organizations, Total	$ 3,367,000	$ 3,490,000

Amount receivable from broker-dealers and clearing organizations, including, but not limited to, securities failed-to-deliver, certain deposits for securities borrowed, open transactions, good faith and margin deposits, commissions and floor brokerage receivables.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=35710130&loc=d3e41645-110958

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant