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Stockholders' Equity - Summary of capital comparison with minimum requirements (Details) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Jan. 01, 2016
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Annual increase in capital (to risk weighted assets) for capital adequacy purposes ratio | 0.625% |  |
Common Equity Tier I Capital (to Risk Weighted Assets) Actual Amount | $ 37,592 | $ 36,442 |
Common Equity Tier I Capital (to Risk Weighted Assets) Actual Ratio | 15.32% | 13.09% |
Common Equity Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Actual Amount | $ 11,044 | $ 12,532 |
Common Equity Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Actual Ratio | 4.50% | 4.50% |
Common Equity Tier I Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Actual Amount | $ 15,952 | $ 18,101 |
Common Equity Tier I Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Actual Ratio | 6.50% | 6.50% |
Total Capital (to Risk Weighted Assets) Actual Amount | $ 39,329 | $ 37,951 |
Total Capital (to Risk Weighted Assets) Actual Ratio | 16.03 | 13.63 |
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount | $ 19,634 | $ 22,278 |
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio | 8.00 | 8.00 | 0.625
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount | $ 24,542 | $ 27,848 |
Total Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio | 10.00 | 10.00 |
Tier I Capital (to Risk Weighted Assets) Actual Amount | $ 37,592 | $ 36,442 |
Tier I Capital (to Risk Weighted Assets) Actual Ratio | 15.32 | 13.09 |
Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Amount | $ 14,725 | $ 16,709 |
Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio | 6.00 | 6.00 |
Tier I Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount | $ 19,634 | $ 22,278 |
Tier I Capital (to Risk Weighted Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio | 8.00 | 8.00 |
Tier I Capital (to Average Assets) Actual Amount | $ 37,592 | $ 36,442 |
Tier I Capital (to Average Assets) Actual Ratio | 8.40 | 9.12 |
Tier I Capital (to Average Assets) For Capital Adequacy Purposes Amount | $ 17,910 | $ 15,980 |
Tier I Capital (to Average Assets) For Capital Adequacy Purposes Ratio | 4.00 | 4.00 |
Tier I Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Amount | $ 22,388 | $ 19,975 |
Tier I Capital (to Average Assets) To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio | 5.00 | 5.00 |
Minimum |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Common Equity Tier I Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Actual Ratio | 4.50% |  |
Total Capital (to Risk Weighted Assets) Actual Ratio | 8.0 |  |
Tier I Capital (to Risk Weighted Assets) Actual Ratio | 4.0 |  |
Tier I Capital (to Average Assets) Actual Ratio | 4.0 |  |
Maximum |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |
Total Capital (to Risk Weighted Assets) For Capital Adequacy Purposes Ratio | 2.5 |  |
Tier I Capital (to Risk Weighted Assets) Actual Ratio | 6.0 |  |

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