| EQUITY, LONG-TERM INCENTIVE COMPENSATION PLANS AND NON-CONTROLLING INTEREST - Non-controlling Interest (Details) | Sep. 30, 2021 | 
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| Orbograph | |
| Noncontrolling Interest [Line Items] | |
| Non-controlling interest, ownership | 94.00% | 
| OLTS | |
| Noncontrolling Interest [Line Items] | |
| Non-controlling interest, ownership | 97.00% | 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. No definition available. 
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- Details 
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- Details 
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