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FINANCIAL INSTRUMENTS (Details 3) - $ / shares |  | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 11, 2021 | Jun. 30, 2021 | Dec. 31, 2020
Statement [Line Items] |  |  |
Expected option life (years) |  | 2 years 2 months 26 days | 2 years 8 months 23 days
Expected stock price volatility |  | 85.01% | 73.93%
Financial instruments [Member] |  |  |
Statement [Line Items] |  |  |
Risk-free interest rate | 0.26% | 0.44% |
Expected dividend yield | 0.00% | 0.00% |
Expected option life (years) | 3 years | 2 years 8 months 12 days |
Expected stock price volatility | 129.51% | 126.52% |
Weighted average fair value at grant date | $ 0.32 | $ 0.42 |

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