12. Employee Benefits (Details - Assumptions)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Weighted average assumptions used to determine benefit obligations
Discount rate	4.05%	4.20%
Weighted average assumptions used to determine net periodic benefit cost
Discount rate	4.20%	3.80%
Expected return on plan assets	7.50%	7.75%