REVENUES FROM CONTRACTS WITH CUSTOMERS - Schedule of disaggregated revenue by category (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 44,032	$ 43,880	$ 88,813	$ 87,153
Revenue concentration risk | Revenue benchmark
Disaggregation of Revenue [Line Items]
Revenue	$ 44,032	43,880	$ 88,813	87,153
Percentage of revenue	100.00%		100.00%
Enterprise, Education and Technology
Disaggregation of Revenue [Line Items]
Revenue	$ 30,965	31,158	$ 63,405	62,488
Enterprise, Education and Technology | Revenue concentration risk | Revenue benchmark
Disaggregation of Revenue [Line Items]
Revenue	$ 30,965	$ 31,158	$ 63,405	$ 62,488
Percentage of revenue	100.00%	100.00%	100.00%	100.00%
Media and Telecom
Disaggregation of Revenue [Line Items]
Revenue	$ 13,067	$ 12,722	$ 25,408	$ 24,665
Media and Telecom | Revenue concentration risk | Revenue benchmark
Disaggregation of Revenue [Line Items]
Revenue	$ 13,067	$ 12,722	$ 25,408	$ 24,665
Percentage of revenue	100.00%	100.00%	100.00%	100.00%
Subscription
Disaggregation of Revenue [Line Items]
Revenue	$ 41,014	$ 40,724	$ 82,184	$ 81,116
Subscription | Enterprise, Education and Technology | Revenue concentration risk | Revenue benchmark
Disaggregation of Revenue [Line Items]
Revenue	$ 29,771	$ 30,258	$ 60,426	$ 60,132
Percentage of revenue	96.10%	97.10%	95.30%	96.20%
Subscription | Media and Telecom | Revenue concentration risk | Revenue benchmark
Disaggregation of Revenue [Line Items]
Revenue	$ 11,243	$ 10,466	$ 21,758	$ 20,984
Percentage of revenue	86.00%	82.30%	85.60%	85.10%
Professional services
Disaggregation of Revenue [Line Items]
Revenue	$ 3,018	$ 3,156	$ 6,629	$ 6,037
Professional services | Enterprise, Education and Technology | Revenue concentration risk | Revenue benchmark
Disaggregation of Revenue [Line Items]
Revenue	$ 1,194	$ 900	$ 2,979	$ 2,356
Percentage of revenue	3.90%	2.90%	4.70%	3.80%
Professional services | Media and Telecom | Revenue concentration risk | Revenue benchmark
Disaggregation of Revenue [Line Items]
Revenue	$ 1,824	$ 2,256	$ 3,650	$ 3,681
Percentage of revenue	14.00%	17.70%	14.40%	14.90%