Investment Securities - Summary of Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Available for sale:
Amortized cost	$ 13,021	$ 19,258
Gross unrealized gains	372	647
Gross unrealized losses	42	23
Fair value	13,351	19,882
Held to maturity:
Amortized cost	9,918	1,224
Gross unrealized gains	241
Gross unrealized losses	134
Fair value	10,025	1,530
Corporate debt obligations
Available for sale:
Amortized cost	500	500
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Fair value	500	500
Residential mortgage-backed securities
Available for sale:
Amortized cost	12,513	18,736
Gross unrealized gains	372	646
Gross unrealized losses	42	23
Fair value	12,843	19,359
Held to maturity:
Amortized cost	6,157
Gross unrealized gains	0
Gross unrealized losses	118
Fair value	6,039
Collateralized mortgage obligations
Available for sale:
Amortized cost	8	22
Gross unrealized gains	0	1
Gross unrealized losses	0	0
Fair value	8	23
States and political subdivisions
Held to maturity:
Amortized cost	3,761	1,224
Gross unrealized gains	241	306
Gross unrealized losses	16	0
Fair value	$ 3,986	$ 1,530

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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