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Income Taxes - Reconciliation of income tax expense computed at satutory rate (Details 1) - USD ($)	3 Months Ended												12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income before income tax expense (benefit)	$ 289,000	$ 60,000	$ 352,000	$ 317,000	$ 552,000	$ (169,000)	$ 786,000	$ 429,000	$ 521,000	$ 637,000	$ 498,000	$ 567,000	$ 1,017,656	$ 1,597,537	$ 2,223,178
Taxes computed at Federal income tax rate													346,003	543,163	755,881
Increase (decrease) resulting from:
Tax-exempt income													(457,858)	(441,890)	(531,764)
State income taxes, net of Federal income tax benefit													42,488	141,966	101,933
Other													(13,697)	1,682	(17,398)
Income tax expense													$ (83,064)	$ 244,921	$ 308,652

X

- Definition

Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(1)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
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-Section 50
-Paragraph 9
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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other deductions.

+ References

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