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Fair Value Measurements and Disclosures - Schedule of Carrying Amounts and Estimated Fair Values of Company's Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Financial assets: |  |
Investment securities available-for-sale | $ 44,071 | $ 24,005
Carrying Amount |  |
Financial assets: |  |
Cash and cash equivalents | 130,910 | 178,253
Investment securities available-for-sale | 44,071 | 24,005
Other investments | 2,476 | 1,596
Loans, net | 563,539 | 592,254
Cash surrender value of life insurance | 15,285 | 15,311
Financial liabilities: |  |
Deposits | 615,231 | 640,165
FHLB advances | 49,020 | 19,117
PPPLF borrowings |  | 100,813
Other borrowings |  | 5,000
Estimated Fair Value |  |
Financial assets: |  |
Cash and cash equivalents | 130,910 | 178,253
Investment securities available-for-sale | 44,071 | 24,005
Other investments | 2,476 | 1,596
Loans, net | 573,930 | 611,625
Cash surrender value of life insurance | 15,285 | 15,311
Financial liabilities: |  |
Deposits | 606,610 | 639,269
FHLB advances | $ 47,694 | 16,769
PPPLF borrowings |  | 100,813
Other borrowings |  | $ 5,000

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