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FAIR VALUE MEASUREMENTS - Financial instruments (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Investment securities |  |
Held-to-maturity | $ 13,152 | $ 17,505
Securities available-for-sale, at fair value | 88,339 | 20,730
Carrying Amount |  |
Financial Assets: |  |
Cash and cash equivalents | 40,884 | 25,245
Investment securities |  |
Held-to-maturity | 13,498 | 17,523
Securities available-for-sale, at fair value | 88,339 | 20,730
Loans receivable, net | 129,566 | 148,778
Bank-owned life insurance | 3,303 | 3,213
Financial Liabilities: |  |
Deposits | 176,795 | 164,598
Borrowed funds | 9,018 | 8,838
Fair Value |  |
Financial Assets: |  |
Cash and cash equivalents | 40,884 | 25,245
Investment securities |  |
Held-to-maturity | 13,152 | 17,505
Securities available-for-sale, at fair value | 88,339 | 20,730
Loans receivable, net | 128,591 | 148,674
Bank-owned life insurance | 3,303 | 3,213
Financial Liabilities: |  |
Deposits | 176,869 | 164,951
Borrowed funds | 8,720 | 9,052
Fair Value | Level 1 |  |
Financial Assets: |  |
Cash and cash equivalents | 40,884 | 25,245
Fair Value | Level 2 |  |
Investment securities |  |
Held-to-maturity | 13,152 | 17,505
Securities available-for-sale, at fair value | 88,339 | 20,730
Bank-owned life insurance | 3,303 | 3,213
Financial Liabilities: |  |
Deposits | 176,869 | 164,951
Borrowed funds | 8,720 | 9,052
Fair Value | Level 3 |  |
Investment securities |  |
Loans receivable, net | $ 128,591 | $ 148,674

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