DISCONTINUED OPERATIONS - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	$ 25,762	$ 17,127	$ 68,363	$ 50,357
Direct costs	14,366	6,246	35,912	18,521
Gross profit	11,396	10,881	32,451	31,836
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue				108,463
Direct costs				69,800
Gross profit				38,663
Permanent Recruitment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	11,507	11,043	32,790	34,428
Direct costs	752	699	2,163	4,181
Gross profit	$ 10,755	$ 10,344	$ 30,627	30,247
Permanent Recruitment | Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue				20,700
Direct costs				190
Gross profit				20,510
Contracting | Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue				76,615
Direct costs				67,980
Gross profit				8,635
Talent Management | Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue				10,694
Direct costs				1,225
Gross profit				9,469
Other | Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue				454
Direct costs				405
Gross profit				$ 49