{
  "cik": 1297107,
  "cik_padded": "0001297107",
  "entityName": "CoastalSouth Bancshares, Inc.",
  "fiscal_years": [
    {
      "accn": "0001193125-26-104114",
      "filed": "2026-03-12",
      "fiscal_year": 2025,
      "form": "10-K",
      "fundamental_units": {
        "buybacks": "USD",
        "capex": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD",
        "total_liabilities": "USD"
      },
      "fundamentals": {
        "buybacks": 69000.0,
        "capex": 1830000.0,
        "eps_diluted": 2.16,
        "free_cash_flow": 61298000.0,
        "net_income": 24892000.0,
        "operating_cash_flow": 63128000.0,
        "revenue": 127713000.0,
        "stockholders_equity": 259529000.0,
        "total_assets": 2306586000.0,
        "total_liabilities": 2047057000.0
      },
      "period_end": "2025-12-31",
      "ratio_units": {
        "leverage": "ratio",
        "net_margin": "ratio",
        "revenue_growth_yoy": "ratio",
        "roa_avg2y": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "leverage": 7.887584817110997,
        "net_margin": 0.1949057652705676,
        "revenue_growth_yoy": 0.032867229011152535,
        "roa_avg2y": 0.011300938097717794,
        "roa_period_end": 0.010791706877610462,
        "roe_avg2y": 0.10947288795653101,
        "roe_period_end": 0.09591221019616306
      }
    },
    {
      "accn": "0001193125-26-104114",
      "filed": "2026-03-12",
      "fiscal_year": 2024,
      "form": "10-K",
      "fundamental_units": {
        "capex": "USD",
        "eps_diluted": "USD/shares",
        "free_cash_flow": "USD",
        "net_income": "USD",
        "operating_cash_flow": "USD",
        "revenue": "USD",
        "stockholders_equity": "USD",
        "total_assets": "USD",
        "total_liabilities": "USD"
      },
      "fundamentals": {
        "capex": 1414000.0,
        "eps_diluted": 2.09,
        "free_cash_flow": -14083000.0,
        "net_income": 21904000.0,
        "operating_cash_flow": -12669000.0,
        "revenue": 123649000.0,
        "stockholders_equity": 195232000.0,
        "total_assets": 2098712000.0,
        "total_liabilities": 1903480000.0
      },
      "period_end": "2024-12-31",
      "ratio_units": {
        "leverage": "ratio",
        "net_margin": "ratio",
        "roa_period_end": "ratio",
        "roe_avg2y": "ratio",
        "roe_period_end": "ratio"
      },
      "ratios": {
        "leverage": 9.749836092443863,
        "net_margin": 0.17714660045774733,
        "roa_period_end": 0.010436877475327724,
        "roe_avg2y": 0.12471140844068038,
        "roe_period_end": 0.11219472217669235
      }
    },
    {
      "accn": "0001193125-26-104114",
      "filed": "2026-03-12",
      "fiscal_year": 2023,
      "form": "10-K",
      "fundamental_units": {
        "stockholders_equity": "USD"
      },
      "fundamentals": {
        "stockholders_equity": 156043000.0
      },
      "period_end": "2023-12-31",
      "ratios": {}
    }
  ],
  "latest_filing": {
    "accn": "0001193125-26-104114",
    "filed": "2026-03-12",
    "form": "10-K"
  },
  "note": "Static grepcent export of verified SEC companyfacts-derived values. Monetary values are raw reported units from grepcent's resolved facts; no scaling and no FX conversion. Capex, dividends, and buybacks are reported as positive outflow magnitudes. ROE/ROA include both period-end basis (site-consistent) and average-of-two-years basis where the prior-year denominator exists.",
  "schema_version": "1",
  "sic": "6022",
  "sic_description": "State Commercial Banks",
  "source_urls": {
    "sec_companyfacts": "https://data.sec.gov/api/xbrl/companyfacts/CIK0001297107.json",
    "sec_submissions": "https://data.sec.gov/submissions/CIK0001297107.json"
  },
  "ticker": "COSO"
}