Carrying Amounts and Fair Value of Financial Instruments (Fair value measurements, nonrecurring basis) (Details) - USD ($)	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired financing receivable, related allowance	$ 14,289		$ 81,600		$ 475,000
Liabilities, Fair Value Disclosure, Nonrecurring	0
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	15,278,866		19,389,698
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	0		0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	4,243,907		2,462,559
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	11,034,959		16,927,139
Mortgage Loans Held For Sale | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	4,243,907		2,462,559
Mortgage Loans Held For Sale | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	0		0
Mortgage Loans Held For Sale | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	4,243,907		2,462,559
Mortgage Loans Held For Sale | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	0		0
Collateral Dependent Impaired Loans (1) | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired financing receivable, related allowance	14,289		81,600
Assets, Fair Value Disclosure, Nonrecurring	8,313,745	[1]	12,565,728	[2]
Collateral Dependent Impaired Loans (1) | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	0	[1]	0	[2]
Collateral Dependent Impaired Loans (1) | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	0	[1]	0	[2]
Collateral Dependent Impaired Loans (1) | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	8,313,745	[1]	12,565,728	[2]
Foreclosed Assets | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	2,721,214		4,361,411
Foreclosed Assets | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	0		0
Foreclosed Assets | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring	$ 0		0
Foreclosed Assets | Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure, Nonrecurring			$ 4,361,411

[1] (1) IMPAIRED LOANS ARE REPORTED NET OF SPECIFIC RESERVES OF

[2] (1) IMPAIRED LOANS ARE REPORTED NET OF SPECIFIC RESERVES OF