RELATED PARTY TRANSACTIONS AND CERTAIN OTHER TRANSACTIONS (Details) - Aircraft lease agreement - Chief Executive Officer - USD ($) |
12 Months Ended | |||
|---|---|---|---|---|
Nov. 13, 2013 |
Jun. 30, 2020 |
Jun. 30, 2019 |
Jun. 30, 2018 |
|
| Related Party Transaction [Line Items] | ||||
| Rate to lease aircraft | $ 5,000 | |||
| Sales, general and administrative | ||||
| Related Party Transaction [Line Items] | ||||
| Aircraft leasing expenses | $ 1,400,000 | $ 1,700,000 | $ 1,600,000 | |