Note 5 - Derivatives (Details) - Cash Flow Hedging [Member] $ in Millions	9 Months Ended
Sep. 30, 2018 USD ($)
Interest rate cap
Initial premium paid upfront for the two caps	$ 2.1
1-month FHLB Advance
short-term liabilities	$ 30.0

The cash outflow for a financial contract that meets the hedge criteria as either a cash flow hedge, fair value hedge, or hedge of a net investment in a foreign operation.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 27
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3581-108585

Name:	us-gaap_PaymentsForHedgeInvestingActivities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration