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(11) Employee Benefits (Details - Weighted average assumptions) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Retirement Benefits [Abstract] |  |
Discount rate | 4.87% | 2.65%
Discount rate | 2.65% | 2.28%
Expected return on plan assets | 7.25% | 7.25%

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