Fair Value - Carrying Amounts and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financial Assets:
Cash and cash equivalents	$ 38,281	$ 67,839
Securities available-for-sale	14,336	14,140
Loans receivable held for investment	348,823	306,643
Accrued interest receivable	1,100	1,077
Federal Home Loan Bank stock	2,573	2,573
Financial Liabilities:
Deposits	280,513	265,495
Federal Home Loan Bank advances	71,156	73,441
Junior subordinated debentures	4,392	3,117
Accrued interest payable	80	52
Carrying Value
Financial Assets:
Cash and cash equivalents	38,281	67,839
Securities available-for-sale	14,336	14,140
Loans receivable held for investment	344,733	304,171
Accrued interest receivable	1,100	1,077
Federal Home Loan Bank stock	2,573	2,573
Financial Liabilities:
Deposits	285,098	272,614
Federal Home Loan Bank advances	70,000	72,000
Junior subordinated debentures	5,100	5,100
Accrued interest payable	80	52
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Assets:
Cash and cash equivalents	38,281	67,839
Securities available-for-sale	2,014	1,973
Accrued interest receivable	72	63
Federal Home Loan Bank stock	2,573	2,573
Significant Other Observable Unobservable Inputs (Level 2)
Financial Assets:
Securities available-for-sale	12,322	12,167
Accrued interest receivable	31	31
Financial Liabilities:
Deposits	280,513	265,495
Federal Home Loan Bank advances	71,156	73,441
Accrued interest payable	74	46
Significant Unobservable Inputs (Level 3)
Financial Assets:
Loans receivable held for investment	348,823	306,643
Accrued interest receivable	997	983
Financial Liabilities:
Junior subordinated debentures	4,392	3,117
Accrued interest payable	$ 6	$ 6