Income Taxes (Details - Rate Table)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of Income Tax Rate Reconciliation [Line Items]
effective income tax reconciliation, compensation-related	(2.50%)	6.40%	1.60%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	(35.00%)	(35.00%)	(35.00%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes	(0.90%)	(1.70%)	(4.80%)
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential	(29.20%)	(99.10%)	(34.40%)
Effective Income Tax Rate Reconciliation, Nondeductible Expense	(2.10%)	(9.40%)	(6.00%)
Effective Income Tax Rate Reconciliation, Tax Credits, Research	(2.50%)	(15.00%)	4.40%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance	(4.10%)	(42.20%)	2.30%
Effective Income Tax Rate Reconciliation, Uncertain Domestic Tax Positions	1.10%	5.50%	2.70%
Effective Income Tax Rate Reconciliation, TCJA net impact	91.40%	0.00%	0.00%
Effective Income Tax Rate Reconciliation, Other Adjustments	(0.20%)	(3.50%)	0.40%
Reported tax rate	88.80%	(95.90%)	(63.20%)
Other Intangible Assets [Member]
Schedule of Income Tax Rate Reconciliation [Line Items]
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses	2.70%	9.30%	2.40%