Note 3 - Loans (Details Textual) xbrli-pure in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jun. 30, 2017 USD ($)
Loans and Leases Receivable, Deferred Income	$ 313		$ 313		$ 294
Interest Receivable	695		695		581
Financing Receivable, Recorded Investment, Nonaccrual Status	865		865		1,187
Financing Receivable, Modifications, Recorded Investment	1,582		1,582		1,740
Troubled Debt Restructuring, Debtor, Subsequent Periods, Contingent Payments, Amount	30		30		33
Loans and Leases Receivable, Impaired, Commitment to Lend	$ 192		$ 192		175
Financing Receivable, Modifications, Number of Contracts	0	0	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down	$ 0	$ 0	$ 0	$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0	0	0
Threshold Amount of Loans Outstanding to Perform Credit Analysis	$ 100		$ 100
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status					239
Non-accrual Loans [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 865		$ 865		$ 948

The threshold amount of loans outstanding balance that will trigger the credit analysis.

No definition available.

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- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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- Definition

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
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- Definition

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.

+ References

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=84173941&loc=SL6953682-111524

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- Definition

Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 7
-Subparagraph (a)
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- Definition

Reflects the amount of the write-down related to a troubled debt restructuring.

+ References

+ Details

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- Definition

Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.8)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-SubTopic 20
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- Definition

Reflects the unfunded portion of contractual agreements to lend funds to borrowers for loans whose terms have been modified by troubled debt restructuring.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount of restructured debt contingently payable based on the occurrence of future events or circumstances.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
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-Paragraph 2
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