Securities Available-for-Sale (Amortized Cost to Fair Value) (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized cost	$ 45,526,060	$ 43,622,065
Gross unrealized gains	31,307	107,569
Gross unrealized losses	1,415,840	600,153
Fair value	44,141,527	43,129,481
U.S. agency securities
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized cost	1,239,890	1,239,357
Gross unrealized gains	0	0
Gross unrealized losses	46,749	5,562
Fair value	1,193,141	1,233,795
Mortgage-backed securities
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized cost	29,669,859	27,331,766
Gross unrealized gains	2,580	0
Gross unrealized losses	1,018,572	547,177
Fair value	28,653,867	26,784,589
Municipal bonds
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Amortized cost	14,616,311	15,050,942
Gross unrealized gains	28,727	107,569
Gross unrealized losses	350,519	47,414
Fair value	$ 14,294,519	$ 15,111,097

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale.

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- Definition

Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale.

+ References

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- Definition

This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.2)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Amount of debt securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 320
-Section 50
-Paragraph 2
-Subparagraph (b)-(g)
-URI http://asc.fasb.org/extlink&oid=75019621&loc=d3e62557-112803

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