REVENUE RECOGNITION - Narrative (Details) - USD ($)		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	[1]	$ 257,249,000	$ 148,103,000
Capitalized contract cost		17,900,000		$ 18,400,000
Amortization of contract costs		448,000	448,000
Minimum Volume Commitments
Disaggregation of Revenue [Line Items]
Revenue from contract with customer		$ 0	$ 2,500,000

[1] The results of the legacy ALTM business are not included in the Company’s consolidated financials prior to February 22, 2022. Refer to the Form 10-Q basis of presentation in Note 1—Description of the Organization and Summary of Significant Accounting Policies, for further information on the Company’s basis of presentation.