Note 5 - Fair Value - Quantitative Information About Level 3 Fair Value Measurements (Details) - Commercial Real Estate - Other [Member] - Bid Indications [Member] $ in Thousands	Jun. 30, 2019 USD ($)
Fair Value	$ 59
Measurement Input, Discount Rate [Member]
Discount Rate	0
Measurement Input, Discount Rate [Member] \| Weighted Average [Member]
Discount Rate	0

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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