Note 3 - Loans (Details Textual)	3 Months Ended	9 Months Ended
Sep. 30, 2016 USD ($)	Sep. 30, 2016 USD ($)
Loans and Leases Receivable, Impaired, Commitment to Lend	$ 0	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0

Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953682-111524

Name:	us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration