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Note 5 - Allowance for Loan Losses (Details) - USD ($) | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2015 | Jun. 30, 2015 | Dec. 31, 2014 | Mar. 31, 2013 | Mar. 30, 2013 | Dec. 31, 2012
Note 5 - Allowance for Loan Losses (Details) [Line Items] |  |  |  |  |  |  |
Allowance for Credit Losses, Change in Method of Calculating Impairment |  |  | $ 1,621,424 |  |  |  |
Loan Balance for Reviewing High Risk Loans Minimum | $ 250,000 | $ 250,000 |  |  | $ 250,000 | $ 50,000 |
Financing Receivable Transfer from Individual Impairment Review to Collective Impairment Review | 4,100,000 |  |  |  |  |  |
Loans receivable | 751,218,462 | 758,635,595 |  | $ 746,093,809 |  |  |
Loans and Leases Receivable, Allowance | 11,805,986 | 8,603,905 |  | 8,802,316 |  |  | $ 12,736,921
Impaired Financing Receivable Recorded Investment Below Review Threshold | $ 2,821,199 | 3,744,733 |  | 3,885,411 |  |  |
Substandard [Member] |  |  |  |  |  |  |
Note 5 - Allowance for Loan Losses (Details) [Line Items] |  |  |  |  |  |  |
Loans receivable |  | 32,397,170 |  | 32,882,846 |  |  |
Loans Not Classified as Impaired [Member] | Substandard [Member] |  |  |  |  |  |  |
Note 5 - Allowance for Loan Losses (Details) [Line Items] |  |  |  |  |  |  |
Loans receivable |  | 11,155,813 |  | 9,356,253 |  |  |
Loans and Leases Receivable, Allowance |  | $ 276,731 |  | $ 747,982 |  |  |

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- Definition Amount of investment of impaired financing receivables below the $250,000 threshold for review and were not individually reviewed for impairment. + References No definition available. + Details
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- Definition Amount of allowance for credit losses related to receivables which had been measured under a general allowance for credit losses methodology that are now identified as troubled debt restructurings. + References No definition available. + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 + Details
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