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FAIR VALUE MEASUREMENTS - Narrative (Details) |  |  | 1 Months Ended | 12 Months Ended | 36 Months Ended
--- | --- | --- | --- | --- | ---
Feb. 28, 2021 USD ($) | Sep. 14, 2018 USD ($) | Feb. 28, 2021 USD ($) | Apr. 30, 2020 USD ($) | Mar. 31, 2022 USD ($) | Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($) company | Mar. 31, 2022 company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Number of companies acquired | company |  |  |  |  |  |  | 2 | 2
Payment of contingent consideration |  |  |  |  | $ 0 | $ 1,748,000 | $ 0 |
Collection of contingent consideration |  |  |  |  | 837,000 | $ 0 | 0 |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Handheld Network Test Tools Business |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Contingent consideration measurement period |  | 2 years |  |  |  |  |  |
Change in fair value of contingent consideration |  |  |  |  | 800,000 |  | $ 800,000 |
Collection of contingent consideration |  |  |  |  | $ 800,000 |  |  |
Maximum | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Handheld Network Test Tools Business |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Contingent consideration related to the divestiture |  | $ 4,000,000 |  |  |  |  |  |
Gigavation |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Payment of contingent consideration | $ 700,000 |  | $ 700,000 |  |  |  |  |
Eastwind |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Payment of contingent consideration |  |  |  | $ 1,000,000 |  |  |  |

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