Note 7 - Derivatives and Hedging Activities (Details Textual) xbrli-pure in Thousands, $ in Millions	3 Months Ended	6 Months Ended
Dec. 31, 2018 USD ($)	Dec. 31, 2017	Dec. 31, 2018 USD ($)	Dec. 31, 2017
Derivative, Collateral, Right to Reclaim Cash	$ 1		$ 1
Interest Rate Cap [Member]
Derivative, Number of Contracts Terminated Prior to Maturity	0	0	0	0
Interest Rate Swap [Member]
Derivative, Number of Contracts Terminated Prior to Maturity	0	0	0	0

Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226016-175313

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=d3e41678-113959

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (d)(2)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

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