REVENUE Revenue by Type (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)
Revenue from Contract with Customer [Abstract]
Number of reportable segments			1
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 97,680	$ 94,876	$ 198,329	$ 189,240
Subscription
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	34,142	21,508	67,096	46,376
Maintenance
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	27,775	30,443	56,102	60,295
Integrated solutions & other
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 35,763	$ 42,925	$ 75,131	$ 82,569