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SHAREHOLDERS' EQUITY AND REGULATORY CAPITAL REQUIREMENTS - Compliance with Regulatory Capital Requirements under Banking Regulations (Details) $ in Thousands | Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($)
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Shareholders Equity And Regulatory Capital Requirements [Abstract] |  |
Total capital to risk weighted assets actual amount | $ 151,555 | $ 145,949
Total capital to risk weighted assets actual ratio | 17.35 | 17.01
Total capital to risk weighted assets for capital adequacy purposes amount | $ 69,879 | $ 68,630
Total capital to risk weighted assets for capital adequacy purposes ratio | 8.0 | 8.0
Total capital to risk weighted assets for capital adequacy purposes well capitalized under prompt corrective action amount | $ 87,349 | $ 85,787
Total capital to risk weighted assets for capital adequacy purposes well capitalized under prompt corrective action ratio | 10.0 | 10.0
Tier 1 to risk weighted assets actual amount | $ 140,529 | $ 135,196
Tier 1 to risk weighted assets actual ratio | 16.09 | 15.76
Tier 1 to risk weighted assets for capital adequacy purposes amount | $ 52,409 | $ 51,472
Tier 1to risk weighted assets for capital adequacy purposes ratio | 6.0 | 6.0
Tier 1 to risk weighted assets well capitalized under prompt corrective action amount | $ 69,879 | $ 68,630
Tier 1 to risk weighted assets well capitalized under prompt corrective action ratio | 8.0 | 8.0
Common equity Tier 1 capital to risk weighted assets actual amount | $ 140,529 | $ 135,196
Common equity Tier 1 capital to risk weighted assets actual ratio | 16.09 | 15.76
Common equity Tier 1 to risk weighted assets for capital adequacy purposes amount | $ 39,307 | $ 38,604
Common equity Tier 1 to risk weighted assets for capital adequacy purposes ratio | 4.5 | 4.5
Common equity Tier 1 to risk weighted assets well capitalized under prompt corrective action amount | $ 56,777 | $ 55,762
Common equity Tier 1 to risk weighted assets well capitalized under prompt corrective action ratio | 6.5 | 6.5
Tier 1 capital leverage to average tangible assets actual amount | $ 140,529 | $ 135,196
Tier 1 capital leverage to average tangible assets actual ratio | 9.63 | 11.79
Tier 1 capital leverage to average tangible assets for capital adequacy purposes amount | $ 58,344 | $ 45,851
Tier 1 capital leverage to average tangible assets for capital adequacy purposes ratio | 4.0 | 4.0
Tier 1 capital leverage to average tangible assets well capitalized under prompt corrective action amount | $ 72,930 | $ 57,313
Tier 1 capital leverage to average tangible assets well capitalized under prompt corrective action ratio | 5.0 | 5.0

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