DISCONTINUED OPERATIONS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	May 15, 2019
Line items constituting pretax profit or loss
Loss from discontinued operations	$ 0	$ 0	$ 0	$ (2,610)
Discontinued Operations, Disposed of by Sale | VDC Transaction
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Aggregate purchase price					$ 30,000
Line items constituting pretax profit or loss
Revenue				27,432
Cost of revenue (excluding depreciation and amortization)				4,016
Selling, general and administrative				18,383
Technology and development				3,280
Depreciation, amortization and impairments				8,007
Other operating expense				384
Other expense (income) and loss (gain), net				(3,814)
Loss from discontinued operations before income taxes				(2,824)
Benefit from income taxes				214
Loss from discontinued operations				$ (2,610)