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(11) Employee Benefits (Details - Asset allocation) | Dec. 31, 2022 | Dec. 31, 2021
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Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Weighted Average Asset Allocation at Year-End | 100.00% | 100.00%
Cash and Cash Equivalents [Member] |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Weighted Average Asset Allocation at Year-End | 0.00% | 0.00%
Equity Securities [Member] |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Weighted Average Asset Allocation at Year-End | 87.00% | 78.00%
Debt Securities [Member] |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Weighted Average Asset Allocation at Year-End | 13.00% | 22.00%

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