(11) Employee Benefits (Details - Asset allocation)	Dec. 31, 2020	Dec. 31, 2019
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted Average Asset Allocation at Year-End	100.00%	100.00%
Cash and Cash Equivalents [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted Average Asset Allocation at Year-End	0.00%	0.00%
Equity Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted Average Asset Allocation at Year-End	82.00%	82.00%
Debt Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Weighted Average Asset Allocation at Year-End	18.00%	18.00%