Stockholders' Equity - Schedule of Stock Option Exercise Price (Details) - $ / shares		12 Months Ended
Mar. 24, 2017	Dec. 31, 2018	Dec. 31, 2017
Equity [Abstract]
Range of Exercise Prices, Lower Range		$ 0
Range of Exercise Prices, Upper Range		$ 46,202
Number of Options Outstanding		5,857,168
Weighted-Average Remaining Contractual Life (years)	6 years	8 years 4 months 28 days	8 years 4 months 2 days
Weighted-Average Exercise Price		$ 1.55
Number of Options Exercisable		2,537,194
Weighted-Average Remaining Contractual Life (years)		8 years 4 months 2 days
Weighted-Average Exercise Price, Options Exercisable		$ 1.57

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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- Definition

Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

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-Publisher FASB
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-Section 50
-Paragraph 2
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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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