REVENUE Remaining Performance Obligations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2027	Dec. 31, 2026	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Deferred Revenue Arrangement [Line Items]
Revenue, Performance Obligation, Description of Timing	six years
Remaining Performance Obligation	$ 35,600
Unbilled Receivables, Not Billable	25,500
Subscription
Deferred Revenue Arrangement [Line Items]
Remaining Performance Obligation	6,210
Subscriptions
Deferred Revenue Arrangement [Line Items]
Remaining Performance Obligation	6,719
Maintenance contracts
Deferred Revenue Arrangement [Line Items]
Remaining Performance Obligation	71,294
Implied PCS
Deferred Revenue Arrangement [Line Items]
Remaining Performance Obligation	5,200
Implied PCS | Forecast [Member]
Deferred Revenue Arrangement [Line Items]
Remaining Performance Obligation		$ 100	$ 300	$ 600	$ 1,100	$ 1,500	$ 1,600
Professional services, training and other
Deferred Revenue Arrangement [Line Items]
Remaining Performance Obligation	$ 2,899