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v3.21.2

WARRANT LIABILITY (Details 3) - $ / shares | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020
Weighted average assumptions: |  |
Risk-free interest rate | 0.44% | 0.20%
Expected dividend yield | 0.00% | 0.00%
Expected option life (years) | 2 years 2 months 26 days | 2 years 8 months 23 days
Expected stock price volatility | 85.01% | 73.93%
Weighted average fair value | $ 0.67 | $ 0.77

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