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