Fair Value Presentation - Schedule of Fair Value Assets Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets:
Investment securities available-for-sale	$ 118,844	$ 92,791
Level 2 [Member]
Assets:
Investment securities available-for-sale	118,844	92,791
Derivative asset	13,967	4,039
Liabilities:
Derivative liability	13,967	4,039
U.S. Treasury Securities [Member]
Assets:
Investment securities available-for-sale	75,000	49,998
Collateralized Mortgage Backed [Member]
Assets:
Investment securities available-for-sale	12,643	17,673
Subordinated Debt [Member]
Assets:
Investment securities available-for-sale	3,053	2,554
Municipal Securities [Member]
Assets:
Investment securities available-for-sale	21,370	14,631
U.S Government Agencies [Member]
Assets:
Investment securities available-for-sale	6,778	7,935
Fair Value, Measurements, Recurring [Member]
Assets:
Total	132,811	96,830
Liabilities:
Total	13,967	4,039
Fair Value, Measurements, Recurring [Member] \| Interest Rate Swap on Loans [Member]
Assets:
Derivative asset	13,967	4,039
Liabilities:
Derivative liability	13,967	4,039
Fair Value, Measurements, Recurring [Member] \| Level 2 [Member]
Assets:
Total	132,811	96,830
Liabilities:
Total	13,967	4,039
Fair Value, Measurements, Recurring [Member] \| Level 2 [Member] \| Interest Rate Swap on Loans [Member]
Assets:
Derivative asset	13,967	4,039
Liabilities:
Derivative liability	13,967	4,039
Fair Value, Measurements, Recurring [Member] \| U.S. Treasury Securities [Member]
Assets:
Investment securities available-for-sale	75,000	49,998
Fair Value, Measurements, Recurring [Member] \| U.S. Treasury Securities [Member] \| Level 2 [Member]
Assets:
Investment securities available-for-sale	75,000	49,998
Fair Value, Measurements, Recurring [Member] \| Collateralized Mortgage Backed [Member]
Assets:
Investment securities available-for-sale	12,643	17,673
Fair Value, Measurements, Recurring [Member] \| Collateralized Mortgage Backed [Member] \| Level 2 [Member]
Assets:
Investment securities available-for-sale	12,643	17,673
Fair Value, Measurements, Recurring [Member] \| Subordinated Debt [Member]
Assets:
Investment securities available-for-sale	3,053	2,554
Fair Value, Measurements, Recurring [Member] \| Subordinated Debt [Member] \| Level 2 [Member]
Assets:
Investment securities available-for-sale	3,053	2,554
Fair Value, Measurements, Recurring [Member] \| Municipal Securities [Member]
Assets:
Investment securities available-for-sale	21,370	14,631
Fair Value, Measurements, Recurring [Member] \| Municipal Securities [Member] \| Level 2 [Member]
Assets:
Investment securities available-for-sale	21,370	14,631
Fair Value, Measurements, Recurring [Member] \| U.S Government Agencies [Member]
Assets:
Investment securities available-for-sale	6,778	7,935
Fair Value, Measurements, Recurring [Member] \| U.S Government Agencies [Member] \| Level 2 [Member]
Assets:
Investment securities available-for-sale	$ 6,778	$ 7,935

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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