Note 18 - Fair Value of Financial Measurements and Disclosures - Schedule of Realized and Unrealized Gains and Losses (Details)	3 Months Ended
Dec. 31, 2016 USD ($)
Total gains included in the three months ended December 31, 2016	$ 1,598,000
Change in unrealized gains relating to assets still held at December 31, 2016	$ 1,598,000

Amount of unrealized (holding) gain (loss) which is included in the statement of income (or changes in net assets) related to those assets still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration