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RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Millions | Apr. 29, 2019 | Mar. 31, 2020 | Oct. 27, 2017
--- | --- | --- | ---
Promissory Note | Notes payable |  |  |
Related Party Transaction [Line Items] |  |  |
Repayment of notes payable | $ 24.7 |  |
GENBAND |  |  |
Related Party Transaction [Line Items] |  |  |
Promissory note issued to GENBAND equity holders |  |  | $ 22.5
GENBAND | Minimum |  |  |
Related Party Transaction [Line Items] |  |  |
Promissory note interest rate |  | 7.50% |
GENBAND | Maximum |  |  |
Related Party Transaction [Line Items] |  |  |
Promissory note interest rate |  | 10.00% |

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