PRODUCT AND GEOGRAPHIC INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	$ 119,064	$ 101,640	$ 94,876	$ 94,364	$ 104,301	$ 90,431	$ 79,281	$ 86,453	$ 409,944	$ 360,466	$ 411,788
United States [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues									173,717	143,518	152,012
Other Americas [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues									20,399	24,026	32,783
Europe, Middle East and Africa [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues									160,390	142,370	161,764
Asia-Pacific [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues									55,438	50,552	65,229
Subscription services
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues									108,443	72,831	45,181
Maintenance services
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues									122,411	124,175	130,443
Service
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues									179,090	163,460	236,164
Integrated solutions
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues									131,073	112,904	172,513
Perpetual Licenses
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues									23,793	27,858	34,932
Professional services, training and other services
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues									$ 24,224	$ 22,698	$ 28,719