GOODWILL AND INTANGIBLE ASSETS (Schedule of Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2020	Jun. 30, 2019	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 25,299		$ 25,456
Accumulated Amortization	(15,995)		(15,374)
Total amortization	9,304		10,082
Business relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	9,918		9,918
Accumulated Amortization	(3,086)		(2,841)
Total amortization	$ 6,832		$ 7,077
Weighted Average Remaining Life	8 years 4 months 24 days		8 years 7 months 6 days
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 7,709		$ 7,832
Accumulated Amortization	(5,326)		(4,959)
Total amortization	$ 2,383		2,873
Weighted Average Remaining Life	2 years	2 years 2 months 12 days
Content
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,780		3,814
Accumulated Amortization	(3,780)		(3,814)
Total amortization	$ 0		0
Weighted Average Remaining Life	0 years	0 years
Domains and data licenses
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 2,869		2,869
Accumulated Amortization	(2,780)		(2,748)
Total amortization	$ 89		121
Weighted Average Remaining Life	1 year 8 months 12 days	1 year 8 months 12 days
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 877		877
Accumulated Amortization	(877)		(872)
Total amortization	$ 0		5
Weighted Average Remaining Life	0 years	2 months 12 days
User relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 146		146
Accumulated Amortization	(146)		(140)
Total amortization	$ 0		$ 6
Weighted Average Remaining Life	0 years	2 months 12 days