INCOME TAXES (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
Reconciliation of Income Tax Provision to Statutory Tax Rate [Abstract]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount									$ 9,230	$ 2,611	$ 530
Effective Income Tax Rate Reconciliation, Tax Credit, Amount									(892)	(1,356)	(815)
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount									1,526	981	921
Effective Income Tax Rate Reconciliation, Tax Contingency, Uncertain Tax Positions									0	(474)	11,185
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount									294	304	1,373
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount									3,464	551	1,049
Effective Income Tax Rate Reconciliation, Non-taxable Income From PPP Loan Forgiveness, Amount									1,638	0	0
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount									3,659	3,527	21,001
Provision for (benefit from) income taxes	$ 735	$ 991	$ 359	$ 482	$ (174)	$ 707	$ 717	$ 122	2,567	1,372	(5,076)
Income (loss) from operations before income taxes:
United States									31,085	9,182	4,311
Foreign									12,870	3,252	(1,786)
(Loss) income before income taxes	15,951	15,766	7,365	4,873	6,913	8,694	2,562	(5,735)	43,955	12,434	2,525
Current tax expense (benefit):
Net cash payments for income taxes									1,034	(391)	783
Federal									0	0	(4)
State									119	133	58
Foreign benefit of net operating losses									(1,616)	(883)	(462)
Other foreign									2,612	1,295	1,632
Total current tax expense (benefit)									1,115	545	1,224
Deferred tax (benefit) expense:
Federal									0	0	0
Other foreign									1,452	827	(6,300)
Total deferred tax (benefit) expense									1,452	827	(6,300)
Provision for (benefit from) income taxes	735	$ 991	$ 359	$ 482	(174)	$ 707	$ 717	$ 122	2,567	1,372	(5,076)
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Increases for tax positions taken during a prior period											11,248
Decreases for tax positions taken during a prior period									(524)	(818)
Unrecognized tax benefits at end of period	$ 11,669				$ 12,193				11,669	12,193	$ 13,011
Foreign [Member]
Reconciliation of Income Tax Provision to Statutory Tax Rate [Abstract]
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount										12,600
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount									$ 1,500
Effective Income Tax Rate Reconciliation, Tax Contingency, Foreign, Amount										11,100
Net Operating Loss Carryforward Irish Subsidiary | Foreign [Member]
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount										$ 6,000