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Note 10 - Regulatory and Operational Matters (Tables) | 6 Months Ended
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Jun. 30, 2018
Notes Tables |
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] |
(In thousands) |  | Patriot National Bancorp, Inc. |  |  | Patriot Bank, N.A. |
|  | June 30, 2018 |  |  | December 31, 2017 |  |  | June 30, 2018 |  |  | December 31, 2017 |
|  | Amount ($) |  |  | Ratio (%) |  |  | Amount ($) |  |  | Ratio (%) |  |  | Amount ($) |  |  | Ratio (%) |  |  | Amount ($) |  |  | Ratio (%) |
Total Capital (to risk weighted assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Actual |  |  | 77,930 |  |  |  | 9.575 |  |  |  | 74,264 |  |  |  | 10.092 |  |  |  | 95,988 |  |  |  | 11.852 |  |  |  | 83,711 |  |  |  | 11.406 |
To be Well Capitalized (1) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 80,987 |  |  |  | 10.000 |  |  |  | 73,393 |  |  |  | 10.000 |
For capital adequacy with Capital Buffer (2) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 79,975 |  |  |  | 9.875 |  |  |  | 67,889 |  |  |  | 9.250 |
For capital adequacy |  |  | 65,108 |  |  |  | 8.000 |  |  |  | 58,868 |  |  |  | 8.000 |  |  |  | 64,790 |  |  |  | 8.000 |  |  |  | 58,715 |  |  |  | 8.000 |
Tier 1 Capital (to risk weighted assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Actual |  |  | 71,394 |  |  |  | 8.772 |  |  |  | 67,959 |  |  |  | 9.235 |  |  |  | 89,451 |  |  |  | 11.045 |  |  |  | 77,407 |  |  |  | 10.547 |
To be Well Capitalized (1) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 64,790 |  |  |  | 8.000 |  |  |  | 58,715 |  |  |  | 8.000 |
For capital adequacy with Capital Buffer (2) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 63,777 |  |  |  | 7.875 |  |  |  | 53,210 |  |  |  | 7.250 |
For capital adequacy |  |  | 48,831 |  |  |  | 6.000 |  |  |  | 44,151 |  |  |  | 6.000 |  |  |  | 48,592 |  |  |  | 6.000 |  |  |  | 44,036 |  |  |  | 6.000 |
Common Equity Tier 1 Capital (to risk weighted assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Actual |  |  | 63,394 |  |  |  | 7.789 |  |  |  | 59,959 |  |  |  | 8.148 |  |  |  | 89,451 |  |  |  | 11.045 |  |  |  | 77,407 |  |  |  | 10.547 |
To be Well Capitalized (1) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 52,642 |  |  |  | 6.500 |  |  |  | 47,706 |  |  |  | 6.500 |
For capital adequacy with Capital Buffer (2) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 51,629 |  |  |  | 6.375 |  |  |  | 42,201 |  |  |  | 5.750 |
For capital adequacy |  |  | 36,623 |  |  |  | 4.500 |  |  |  | 33,113 |  |  |  | 4.500 |  |  |  | 36,444 |  |  |  | 4.500 |  |  |  | 33,027 |  |  |  | 4.500 |
Tier 1 Leverage Capital (to average assets): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Actual |  |  | 71,394 |  |  |  | 7.974 |  |  |  | 67,959 |  |  |  | 8.219 |  |  |  | 89,451 |  |  |  | 10.029 |  |  |  | 77,407 |  |  |  | 9.360 |
To be Well Capitalized (1) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 44,598 |  |  |  | 5.000 |  |  |  | 41,351 |  |  |  | 5.000 |
For capital adequacy |  |  | 35,815 |  |  |  | 4.000 |  |  |  | 33,072 |  |  |  | 4.000 |  |  |  | 35,679 |  |  |  | 4.000 |  |  |  | 33,081 |  |  |  | 4.000 |

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