v3.19.1

Stock-Based Compensation (Details - Narrative) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Option expiration period (in years)	10 years
Vesting period (in years)	4 years
Share-based Compensation Arrangement by Share-based Payment Award
Unrecognized compensation expense	$ 642.3
Recognition period (in years)	3 years 1 month 6 days
2013 ESPP
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Payroll Deduction, Percent	15.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Purchase Period	6 months
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent	85.00%

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Payroll Deduction, Percent

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Purchase Period

+ References

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- References

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

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