STOCK BASED COMPENSATION - Summary of RSU activity (Details) - Restricted stock units - $ / shares
|
12 Months Ended |
Jun. 30, 2020 |
Jun. 30, 2019 |
Jun. 30, 2018 |
| Number of Shares |
|
|
|
| Non-vested RSUs, beginning balance (in shares) |
112,786
|
144,100
|
180,373
|
| RSUs granted (in shares) |
20,333
|
49,965
|
69,188
|
| RSUs vested (in shares) |
(42,801)
|
(53,443)
|
(78,358)
|
| RSUs forfeited (in shares) |
(7,747)
|
(27,836)
|
(27,103)
|
| Non-vested RSUs, ending balance (in shares) |
82,571
|
112,786
|
144,100
|
| Weighted Average Grant Date Fair Value |
|
|
|
| Non-vested RSUs, weighted average grant date fair value, beginning balance (in dollars per share) |
$ 73.24
|
$ 53.24
|
$ 40.51
|
| RSUs granted, weighted average grant date fair value (in dollars per share) |
157.68
|
92.77
|
64.66
|
| RSUs vested, weighted average grant date fair value (in dollars per share) |
61.28
|
43.67
|
38.09
|
| RSUs forfeited, weighted average grant date fair value (in dollars per share) |
80.30
|
61.55
|
41.45
|
| Non-vested RSUs, weighted average grant date fair value, ending balance (in dollars per share) |
$ 99.57
|
$ 73.24
|
$ 53.24
|