Fair Value Measurments - Carrying Amount and Estimated Fair Values (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Financial Assets
Interest-bearing deposits in other financial institutions	$ 2,728	$ 2,728
Available-for-sale securities	58,541	60,200
Loans, net of allowance	342,064	325,866
Accrued interest receivable	1,536	1,680
Federal Home Loan Bank stock	2,025	2,025
Financial Liabilities
Subordinated debentures	5,000	5,000
Accrued interest payable	223	213
Level 1
Financial Assets
Cash and cash equivalents	7,354	15,255
Interest-bearing deposits in other financial institutions	2,761	2,728
Accrued interest receivable	18
Financial Liabilities
Demand and savings deposits	213,574	216,857
Accrued interest payable	11	9
Level 2
Financial Assets
Available-for-sale securities	57,281	58,860
Loans held for sale	121
Accrued interest receivable	300	337
Financial Liabilities
Time deposits	140,196	153,801
FHLB advances	35,023	12,902
Other borrowings	1,000	2,000
Accrued interest payable	182	177
Level 3
Financial Assets
Available-for-sale securities	1,260	1,340
Loans, net of allowance	343,856	326,886
Accrued interest receivable	1,218	1,343
Financial Liabilities
Subordinated debentures	2,434	2,434
Accrued interest payable	30	27
Carrying Amount
Financial Assets
Cash and cash equivalents	7,354	15,255
Interest-bearing deposits in other financial institutions	2,728	2,728
Available-for-sale securities	57,862	59,965
Loans, net of allowance	342,064	325,866
Loans held for sale	118
Accrued interest receivable	1,536	1,680
Federal Home Loan Bank stock	2,025	2,025
Financial Liabilities
Demand and savings deposits	213,574	216,857
Time deposits	139,859	153,531
FHLB advances	35,000	13,000
Other borrowings	1,000	2,000
Subordinated debentures	5,000	5,000
Accrued interest payable	223	213
Total
Financial Assets
Cash and cash equivalents	7,354	15,255
Interest-bearing deposits in other financial institutions	2,761	2,728
Available-for-sale securities	58,541	60,200
Loans, net of allowance	343,856	326,886
Loans held for sale	121
Accrued interest receivable	1,536	1,680
Financial Liabilities
Demand and savings deposits	213,574	216,857
Time deposits	140,196	153,801
FHLB advances	35,023	12,902
Other borrowings	1,000	2,000
Subordinated debentures	2,434	2,434
Accrued interest payable	$ 223	$ 213