SEGMENT AND GEOGRAPHIC DATA Segment Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) segments	Mar. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | segments	3
Revenue, from external customers	$ 101,227	$ 124,317
Inter-segment revenue	0	0
Total revenue	101,227	124,317
Gross margin, from external customers	41,262	47,904
Inter-segment gross margin	0	0
Gross margin	41,262	47,904
Business reorganization expenses (recovery) and impairment of long lived assets expense	637	1,343
EBITDA (loss)	(3,154)	(5,592)
Depreciation and amortization	688	1,111
Intercompany interest income (expense), net	0	0
Interest income (expense), net	(54)	(80)
Income (loss) from continuing operations before provision for income taxes	(3,896)	(6,783)
Accounts receivable, net	64,208	79,509	$ 62,420
Long-lived assets, net of accumulated depreciation and amortization	9,949	10,897
Total assets	121,838	121,171	$ 124,949
Hudson Asia Pacific
Segment Reporting Information [Line Items]
Total revenue	11,939	14,098
Long-lived assets, net of accumulated depreciation and amortization	3,284	2,671
Hudson Europe
Segment Reporting Information [Line Items]
Total revenue	12,123	21,859
Long-lived assets, net of accumulated depreciation and amortization	167	321
Operating Segments | Hudson Americas
Segment Reporting Information [Line Items]
Revenue, from external customers	3,837	10,978
Inter-segment revenue	0	0
Total revenue	3,837	10,978
Gross margin, from external customers	3,341	4,621
Inter-segment gross margin	(2)	(7)
Gross margin	3,339	4,614
Business reorganization expenses (recovery) and impairment of long lived assets expense	(16)	421
EBITDA (loss)	162	(1,620)
Depreciation and amortization	22	102
Intercompany interest income (expense), net	0	0
Interest income (expense), net	0	(33)
Income (loss) from continuing operations before provision for income taxes	140	(1,755)
Accounts receivable, net	3,162	6,934
Long-lived assets, net of accumulated depreciation and amortization	28	535
Total assets	7,243	9,423
Operating Segments | Hudson Asia Pacific
Segment Reporting Information [Line Items]
Revenue, from external customers	51,071	53,139
Inter-segment revenue	0	0
Total revenue	51,071	53,139
Gross margin, from external customers	18,771	20,876
Inter-segment gross margin	(60)	(31)
Gross margin	18,711	20,845
Business reorganization expenses (recovery) and impairment of long lived assets expense	197	8
EBITDA (loss)	(1,231)	804
Depreciation and amortization	404	671
Intercompany interest income (expense), net	0	0
Interest income (expense), net	(40)	(42)
Income (loss) from continuing operations before provision for income taxes	(1,675)	91
Accounts receivable, net	31,331	31,957
Long-lived assets, net of accumulated depreciation and amortization	7,475	7,300
Total assets	51,313	49,300
Operating Segments | Hudson Europe
Segment Reporting Information [Line Items]
Revenue, from external customers	46,319	60,200
Inter-segment revenue	62	14
Total revenue	46,381	60,214
Gross margin, from external customers	19,150	22,407
Inter-segment gross margin	62	37
Gross margin	19,212	22,444
Business reorganization expenses (recovery) and impairment of long lived assets expense	484	880
EBITDA (loss)	(330)	(2,150)
Depreciation and amortization	183	228
Intercompany interest income (expense), net	(57)	(130)
Interest income (expense), net	(14)	(5)
Income (loss) from continuing operations before provision for income taxes	(584)	(2,513)
Accounts receivable, net	29,715	40,618
Long-lived assets, net of accumulated depreciation and amortization	1,851	2,073
Total assets	54,047	58,811
Corporate
Segment Reporting Information [Line Items]
Revenue, from external customers	0	0
Inter-segment revenue	0	0
Total revenue	0	0
Gross margin, from external customers	0	0
Inter-segment gross margin	0	0
Gross margin	0	0
Business reorganization expenses (recovery) and impairment of long lived assets expense	(28)	34
EBITDA (loss)	(1,755)	(2,626)
Depreciation and amortization	79	110
Intercompany interest income (expense), net	57	134
Interest income (expense), net	0	0
Income (loss) from continuing operations before provision for income taxes	(1,777)	(2,602)
Accounts receivable, net	0	0
Long-lived assets, net of accumulated depreciation and amortization	595	989
Total assets	9,235	3,637
Elimination
Segment Reporting Information [Line Items]
Revenue, from external customers	0	0
Inter-segment revenue	(62)	(14)
Total revenue	(62)	(14)
Gross margin, from external customers	0	0
Inter-segment gross margin	0	1
Gross margin	0	1
Business reorganization expenses (recovery) and impairment of long lived assets expense	0	0
EBITDA (loss)	0	0
Depreciation and amortization	0	0
Intercompany interest income (expense), net	0	(4)
Interest income (expense), net	0	0
Income (loss) from continuing operations before provision for income taxes	0	(4)
Accounts receivable, net	0	0
Long-lived assets, net of accumulated depreciation and amortization	0	0
Total assets	$ 0	$ 0