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13. Employee Benefits (Details - Asset Allocation)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Weighted Average Asset Allocation at Year-End 100.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations 100.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
Cash And Cash Equivalents [Member]    
Weighted Average Asset Allocation at Year-End 1.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_InvestmentTypeAxis
= us-gaap_CashAndCashEquivalentsMember		 0.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_InvestmentTypeAxis
= us-gaap_CashAndCashEquivalentsMember
Equity Securities [Member]    
Weighted Average Asset Allocation at Year-End 84.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_EquitySecuritiesMember		 87.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_EquitySecuritiesMember
Debt Securities [Member]    
Weighted Average Asset Allocation at Year-End 15.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_DebtSecuritiesMember		 13.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_DebtSecuritiesMember