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Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2018

Equity [Abstract]

Schedule of Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques

The fair value of share-based awards was estimated using the Black-Scholes model with the following weighted-average assumptions for the six months ended June 30, 2018 and 2017:

		2018				2017
Dividend yield			0.00				0.00
Risk-free interest rate			2.68-2.97	%			2.21-2.45	%
Expected volatility			116.3-137.3	%			137.8-139.0	%
Expected life (in years)			5-10				10

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- References

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- Definition

Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

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