GOODWILL AND OTHER INTANGIBLES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Goodwill [Roll Forward]
Carrying amount, December 31, 2019			$ 36,204
Goodwill attributable to acquisitions			45,909
Foreign currency adjustments			3,189
Carrying amount, September 30, 2020	$ 85,302		85,302
Finite-Lived Intangible Assets, Net [Abstract]
Accumulated amortization	(6,601)		(6,601)		$ (3,045)
Net carrying amount	47,288		47,288
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	8,007		8,007
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Carrying Amount	61,896		61,896		14,517
Accumulated amortization	(6,601)		(6,601)		(3,045)
Net intangible assets	55,295		55,295		11,472
Amortization expense	1,502	$ 346	3,556	$ 953
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2020 (remaining)	1,456		1,456
2021	5,696		5,696
2022	5,661		5,661
2023	5,300		5,300
2024	5,174		5,174
Thereafter	24,001		24,001
Net carrying amount	47,288		47,288
Indefinite-lived intangible assets	8,007		8,007
Net intangible assets	55,295		55,295		11,472
Trade names
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	8,007		8,007		0
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Indefinite-lived intangible assets	8,007		8,007		0
Customer relationships and other
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	45,053		45,053		6,205
Accumulated amortization	(5,067)		(5,067)		(2,226)
Net carrying amount	39,986		39,986		3,979
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated amortization	(5,067)		(5,067)		(2,226)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Net carrying amount	39,986		39,986		3,979
Developed technology
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	8,648		8,648		8,200
Accumulated amortization	(1,458)		(1,458)		(819)
Net carrying amount	7,190		7,190		7,381
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated amortization	(1,458)		(1,458)		(819)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Net carrying amount	7,190		7,190		7,381
Trade names
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	188		188		112
Accumulated amortization	(76)		(76)		0
Net carrying amount	112		112		112
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated amortization	(76)		(76)		0
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Net carrying amount	$ 112		$ 112		$ 112