Fair Value of Financial Instruments, Estimated Fair Value and Carrying Value of Financial Instrument (Details) $ in Thousands	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2019
Financial assets [Abstract]
Investment securities held-to-maturity	$ 10,263
SBA servicing asset	5,230	$ 3,940
Level 1 [Member] | Carrying Amount [Member]
Financial assets [Abstract]
Cash and cash equivalents	116,646	85,754
Level 1 [Member] | Estimated Fair Value [Member]
Financial assets [Abstract]
Cash and cash equivalents	116,646	85,754
Level 2 [Member] | Carrying Amount [Member]
Financial assets [Abstract]
Investment securities held-to-maturity	10,986	11,423
Investment in FHLB stock	449	378
Loans held-for-sale	73,805	60,748
Accrued interest receivable	1,347	1,548
SBA servicing asset	5,225	3,938
Financial liabilities [Abstract]
Total deposits	277,460	251,892
Accrued interest payable	39	48
PPP Liquidity Facility	952	1,050
Level 2 [Member] | Estimated Fair Value [Member]
Financial assets [Abstract]
Investment securities held-to-maturity	10,263	11,332
Investment in FHLB stock	449	378
Loans held-for-sale	73,800	60,743
Accrued interest receivable	1,347	1,548
SBA servicing asset	5,225	3,938
Financial liabilities [Abstract]
Total deposits	265,883	249,488
Accrued interest payable	39	48
PPP Liquidity Facility	952	1,050
Level 3 [Member] | Carrying Amount [Member]
Financial assets [Abstract]
Loans held for investment	189,549	198,102
Investment in BFG	5,400	5,900
Level 3 [Member] | Estimated Fair Value [Member]
Financial assets [Abstract]
Loans held for investment	192,172	197,412
Investment in BFG	$ 5,400	$ 5,900
Lack of Marketability Discount [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Investment, measurement input			0.20
Discount to Non-Voting Shares [Member]
Fair Value Measurement Inputs and Valuation Techniques [Abstract]
Investment, measurement input			0.0450