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12. Employee Benefits (Details - Asset allocation)	Dec. 31, 2018	Dec. 31, 2017
Weighted Average Asset Allocation at Year-End	100.00%	100.00%
Cash And Cash Equivalents [Member]
Weighted Average Asset Allocation at Year-End	0.00%	0.00%
Equity Securities [Member]
Weighted Average Asset Allocation at Year-End	78.00%	83.00%
Debt Securities [Member]
Weighted Average Asset Allocation at Year-End	22.00%	17.00%

X

- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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