Note 12 - Deposits - Composition of Deposits and Related Percentage Mix (Details) - USD ($)	Mar. 31, 2018	Mar. 31, 2017
Savings, amount	$ 42,499,381	$ 44,614,415
Savings, percentage	11.00%	11.00%
Noninterest-bearing checking, amount	$ 29,557,943	$ 30,401,454
Noninterest-bearing checking, percentage	7.00%	7.00%
Interest-bearing checking, amount	$ 27,219,285	$ 26,415,189
Interest-bearing checking, percentage	7.00%	6.00%
Money market accounts, amount	$ 58,466,228	$ 62,962,902
Money market accounts, percentage	14.00%	15.00%
Time deposits, amount	$ 246,988,613	$ 247,632,742
Time deposits, percentage	61.00%	60.00%
Gross deposits, amount	$ 404,731,450	$ 412,026,702
Gross deposits, percentage	100.00%	100.00%
Premium on deposits asssumed	$ 411,525	$ 829,072
Total deposits	$ 405,142,975	$ 412,855,774

Percentage of non-interest-bearing domestic checkings deposit liabilities to total deposit liabilities.

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- Definition

Amount of premium on deposits assumed.

+ References

No definition available.

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- Definition

The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.12)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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- Definition

The aggregate of all domestic interest-bearing and noninterest-bearing deposit liabilities.

+ References

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- Definition

Amount of interest-bearing domestic checking deposit liabilities.

+ References

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- Definition

Amount of interest-bearing domestic money market demand account deposit liabilities.

+ References

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- Definition

Amount of interest-bearing domestic savings deposit liabilities. Saving deposits bear interest and have no stated maturity.

+ References

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- Definition

Amount of interest-bearing domestic time deposits. Time deposits bear interest for a fixed, stated period of time and include certificate of deposits and individual retirement accounts.

+ References

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- Definition

Amount of noninterest-bearing domestic checking deposit liabilities.

+ References

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- Definition

Percentage of interest-bearing domestic deposit liabilities to total deposit liabilities.

+ References

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Percentage of interest-bearing domestic checking demand deposit liabilities to total deposit liabilities.

+ References

No definition available.

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- Definition

Percentage of interest-bearing domestic money market demand account deposit liabilities to total deposit liabilities.

+ References

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Percentage of interest-bearing domestic savings deposit liabilities to total deposit liabilities.

+ References

No definition available.

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Percentage of interest-bearing domestic time deposit liabilities to total deposit liabilities.

+ References

No definition available.

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