26. STOCK OPTIONS (Details)	12 Months Ended
Jun. 30, 2018	Jun. 30, 2017
Expected life (years)	2 years 6 months	2 years 6 months
Minimum Member
Expected volatility	47.29%	47.29%
Risk-free interest rate	0.30%	0.30%
Maximum Member
Expected volatility	104.94%	104.94%
Risk-free interest rate	0.78%	0.78%

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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