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CAPITAL STOCK (Tables)
3 Months Ended
Mar. 31, 2019
Stockholders' Equity Note [Abstract]  
Schedule of Stockholders' Equity Note, Warrants or Rights
The following table summarizes the Company’s share purchase warrants denominated in US dollars. These warrants are accounted for as derivative liabilities as the functional currency of the entity issuing the warrants, Energy Fuels Inc., is Canadian dollars.
Month Issued
Expiry Date
 
Exercise Price
USD$
 
Warrants
Outstanding
 
Fair value at
March 31, 2019
September 2016 (a)
September 20, 2021
 
2.45

 
4,167,480

 
7,142

(a) The warrants issued in September 2016 are classified as Level 1 under the fair value hierarchy (Note 16).
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
.
The fair value of the options granted under the Compensation Plan for the three months ended March 31, 2019 was estimated at the date of grant, using the Black-Scholes Option Valuation Model, with the following weighted-average assumptions:
Risk-free interest rate
2.620
 
Expected life
5.0 years
 
Expected volatility
59.4
*
Expected dividend yield
0.00%
 
Weighted-average expected life of option
5.00
 
Weighted-average grant date fair value
$1.54
 

*
Expected volatility is measured based on the Company’s historical share price volatility over a period equivalent to the expected life of the options.