Stockholders' Equity - Estimate the fair values (Details) |
6 Months Ended | |
|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Expected dividend yield | 0.00% | 0.00% |
| Expected volatility | 64.00% | |
| Maximum [Member] | ||
| Risk-free interest rate | 1.69% | 3.00% |
| Expected life (in years) | 6 years | 6 years |
| Expected volatility | 69.00% | |
| Minimum [Member] | ||
| Risk-free interest rate | 1.61% | 2.82% |
| Expected life (in years) | 5 years | 5 years |
| Expected volatility | 68.00% | |