GOODWILL AND OTHER INTANGIBLES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Goodwill [Roll Forward]
Carrying amount, December 31, 2018			$ 26,679
Goodwill attributable to acquisitions			547
Foreign currency adjustments			(10)
Carrying amount, September 30, 2019	$ 27,216		27,216
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	11,926		11,926		$ 11,503
Accumulated amortization	(2,720)		(2,720)		(1,739)
Net carrying amount	9,206		9,206		9,764
Amortization expense	346	$ 97	953	$ 291
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2019 (remaining)	322		322
2020	1,295		1,295
2021	1,291		1,291
2022	1,275		1,275
2023	926		926
Thereafter	4,097		4,097
Net carrying amount	9,206		9,206		9,764
Developed technology
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	8,200		8,200		8,200
Accumulated amortization	(615)		(615)		0
Net carrying amount	7,585		7,585		8,200
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Net carrying amount	7,585		7,585		8,200
Customer relationships and other
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	3,726		3,726		3,303
Accumulated amortization	(2,105)		(2,105)		(1,739)
Net carrying amount	1,621		1,621		1,564
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Net carrying amount	$ 1,621		$ 1,621		$ 1,564