Carrying Amounts and Fair Value of Financial Instruments (Summary of the carrying value and estimated fair value of financial instruments) (Details) - USD ($)	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Financial Assets:
Cash And Cash Equivalents	$ 10,991,000	$ 9,375,000
Cash and Cash Equivalents	10,990,573	9,374,549	$ 8,883,215	$ 8,381,951
Certificates of Deposits With Other Banks	1,425,000	2,445,000
Investment And Mortgage-Backed Securities, Carrying Value Disclosure		387,643,000
Investments	428,546,061	387,643,385
Certificates of Deposit with Other Banks	1,425,005	2,445,005
Investment And Mortgage-Backed Securities	428,662,000	387,430,000
Loans Receivable, Net	359,962,511	359,722,846
Loans Receivable, Net	358,546,000	357,457,000
Investment in Federal Home Loan Bank Stock, Carrying Value		2,777,000
FHLB Stock	2,667,000	2,777,000
Federal Home Loan Bank (FHLB) Stock, at Cost	2,667,300	2,776,500
Checking, Savings, And Money Market Accounts, Carrying Value Disclosure		438,559,000
Financial Liabilities:
Checking, Savings, And Money Market Accounts	464,692,000	438,559,000
Certificate Accounts, Carrying Value	226,732,000	215,545,000
Certificate Accounts	225,210,000	214,149,000
FHLB Advances, Carrying Value		48,395,000
Advances From FHLB	47,726,719	48,395,000
Advances From FHLB	47,526,000	48,153,000
Other Borrowed Money	12,853,000	9,338,000
Other Borrowings	12,852,794	9,338,148
Senior Convertible Debentures	6,084,000	5,155,000
Junior Subordinated Debentures	5,155,000	5,155,000
Junior Subordinated Debentures	5,155,000	6,084,000
Senior Convertible Debentures	6,084,000	6,084,000
Fair Value, Inputs, Level 1
Financial Assets:
Cash And Cash Equivalents		9,375,000
Cash and Cash Equivalents	10,991,000
Certificates of Deposits With Other Banks	0	0
Investment And Mortgage-Backed Securities	0	0
Loans Receivable, Net	0	0
FHLB Stock		2,777,000
Federal Home Loan Bank (FHLB) Stock, at Cost	2,667,000
Financial Liabilities:
Checking, Savings, And Money Market Accounts	464,692,000	438,559,000
Certificate Accounts	0	0
Advances From FHLB	0	0
Other Borrowed Money		9,338,000
Other Borrowings	12,853,000
Senior Convertible Debentures	0	0
Junior Subordinated Debentures	0	0
Fair Value, Inputs, Level 2 [Member]
Financial Assets:
Cash And Cash Equivalents	0	0
Certificates of Deposits With Other Banks		2,445,000
Certificates of Deposit with Other Banks	1,425,000
Investment And Mortgage-Backed Securities	428,662,000	387,430,000
Loans Receivable, Net	0	0
FHLB Stock	0	0
Financial Liabilities:
Checking, Savings, And Money Market Accounts	0	0
Certificate Accounts	225,210,000	214,149,000
Advances From FHLB	47,526,000	48,153,000
Other Borrowed Money	0	0
Senior Convertible Debentures		5,155,000
Junior Subordinated Debentures	6,084,000
Junior Subordinated Debentures		6,084,000
Senior Convertible Debentures	5,155,000
Fair Value, Inputs, Level 3
Financial Assets:
Cash And Cash Equivalents	0	0
Certificates of Deposits With Other Banks	0	0
Investment And Mortgage-Backed Securities	0	0
Loans Receivable, Net	358,546,000	357,457,000
FHLB Stock	0	0
Financial Liabilities:
Checking, Savings, And Money Market Accounts	0	0
Certificate Accounts	0	0
Advances From FHLB	0	0
Other Borrowed Money	0	0
Senior Convertible Debentures	0	0
Junior Subordinated Debentures	$ 0	$ 0