REVENUE FROM CONTRACTS WITH CUSTOMERS - Additional information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 52,935		$ 52,935		$ 49,673
Unbilled receivables	16,491		16,491		12,315
Advances against customer contracts	200		200		200
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Recognized revenue	10,055	$ 9,370	24,994	$ 26,649
Capitalized costs	2,564		2,564		1,605
Capitalized cost, recognized	175	$ 51	1,090	$ 109
Service and Fee
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Deferred revenue	79,226		79,226		$ 69,507
Service and Fee | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 48,031		$ 48,031
Revenue, remaining performance obligation, expected timing of satisfaction, period	6 months		6 months
Service and Fee | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 12,620		$ 12,620
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year		1 year
Service and Fee | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 8,421		$ 8,421
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year		1 year
Service and Fee | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 4,792		$ 4,792
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year		1 year
Service and Fee | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 2,247		$ 2,247
Revenue, remaining performance obligation, expected timing of satisfaction, period	1 year		1 year
Service and Fee | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 3,115		$ 3,115
Revenue, remaining performance obligation, expected timing of satisfaction, period