Fair Value - Fair Value - Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Financial Assets:
Securities available-for-sale	$ 12,554	$ 13,202
Carrying Value
Financial Assets:
Cash and cash equivalents	27,209	18,430
Securities available-for-sale	12,554	13,202
Loans receivable held for sale	33,756
Loans receivable held for investment	361,738	379,454
Accrued interest receivable	1,170	1,178
Federal Home Loan Bank stock	2,835	2,573
Financial Liabilities:
Deposits	296,564	287,427
Federal Home Loan Bank advances	101,000	85,000
Junior subordinated debentures	5,100	5,100
Accrued interest payable	124	154
Fair Value
Financial Assets:
Cash and cash equivalents	27,209	18,430
Securities available-for-sale	12,554	13,202
Loans receivable held for sale	34,226
Loans receivable held for investment	364,723	382,717
Accrued interest receivable	1,170	1,178
Federal Home Loan Bank stock	2,835	2,573
Financial Liabilities:
Deposits	286,902	278,254
Federal Home Loan Bank advances	101,507	85,748
Junior subordinated debentures	4,436	4,414
Accrued interest payable	124	154
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value
Financial Assets:
Cash and cash equivalents	27,209	18,430
Securities available-for-sale	1,989	1,988
Accrued interest receivable	71	64
Federal Home Loan Bank stock	2,835	2,573
Significant Other Observable Unobservable Inputs (Level 2) | Fair Value
Financial Assets:
Securities available-for-sale	10,565	11,214
Loans receivable held for sale	34,226
Accrued interest receivable	28	29
Financial Liabilities:
Deposits	286,902	278,254
Federal Home Loan Bank advances	101,507	85,748
Accrued interest payable	117	147
Significant Unobservable Inputs (Level 3) | Fair Value
Financial Assets:
Loans receivable held for investment	364,723	382,717
Accrued interest receivable	1,071	1,085
Financial Liabilities:
Junior subordinated debentures	4,436	4,414
Accrued interest payable	$ 7	$ 7