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v3.19.3.a.u2

RELATED PARTIES (Details) - USD ($) | Apr. 29, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Oct. 27, 2017
--- | --- | --- | --- | ---
GENBAND |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Promissory note issued to GENBAND equity holders |  |  |  | $ 22,500,000.0
Minimum | GENBAND |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Promissory note interest rate |  | 7.50% |  |
Maximum | GENBAND |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Promissory note interest rate |  | 10.00% |  |
Promissory Note |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Promissory note issued to GENBAND equity holders |  |  | $ 22,500,000 |
Promissory note balance |  |  | 24,100,000 |
Interest converted to principal |  |  | $ 1,600,000 |
Notes Payable, Other Payables | Promissory Note |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Repayments of outstanding amounts | $ 24,700,000 |  |  |

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