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EQUITY, LONG-TERM INCENTIVE COMPENSATION PLANS AND NON-CONTROLLING INTEREST - Non-controlling Interest (Details) - USD ($) $ in Thousands | 1 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Feb. 28, 2021 | Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Noncontrolling Interest [Line Items] |  |  |  |
Proceeds from sale of business |  | $ 16,833 | $ 0 |
Gain (loss) from sale of business |  | $ 4,422 | $ 0 |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | PixCell |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Proceeds from sale of business | $ 20,200 |  |  |
Gain (loss) from sale of business | $ 4,400 |  |  |
Orbograph |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Non-controlling interest, ownership |  | 94.00% |  |
OLTS |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Non-controlling interest, ownership |  | 97.00% |  |
PixCell |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Non-controlling interest, ownership |  |  |  | 52.00%

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