SEGMENT AND GEOGRAPHIC DATA Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014 segments		Sep. 30, 2013		Dec. 31, 2013
Segment Reporting Information [Line Items]
Number of Reportable Segments					3
Revenue, from external customers	$ 149,278		$ 139,287		$ 444,515		$ 422,573
Inter-segment revenue	0		0		0		0
Total revenue	149,278	[1]	139,287	[1]	444,515	[1]	422,573	[1]
Gross margin, from external customer	55,687		50,491		169,588		156,591
Inter-segment gross margin	0		0		0		0
Gross margin	55,687		50,491		169,588		156,591
Business reorganization expenses (recovery)	794		594		2,026		3,803
EBITDA (loss)	(3,470)	[2]	(4,423)	[2]	(7,435)	[2]	(15,776)	[2]
Depreciation and amortization	1,467		1,408		4,242		4,461
Intercompany interest income (expense), net	0		0		0		0
Interest income (expense), net	(192)		(146)		(533)		(422)
Income (loss) from continuing operations before provision for income taxes	(5,129)		(5,977)		(12,210)		(20,659)
Accounts receivable, net	83,116		82,785		83,116		82,785		76,467
Long-lived assets, net of accumulated depreciation and amortization	14,054	[3]	16,470	[3]	14,054	[3]	16,470	[3]
Total assets	147,024		174,905		147,024		174,905		158,829
Hudson Americas
Segment Reporting Information [Line Items]
Revenue, from external customers	13,036		12,760		38,437		39,509
Inter-segment revenue	11		0		48		(1)
Total revenue	13,047		12,760		38,485		39,508
Gross margin, from external customer	5,570		4,682		15,464		13,798
Inter-segment gross margin	3		0		34		(2)
Gross margin	5,573		4,682		15,498		13,796
Business reorganization expenses (recovery)	0		74		93		360
EBITDA (loss)	33	[2]	(380)	[2]	(326)	[2]	(1,148)	[2]
Depreciation and amortization	137		123		360		375
Intercompany interest income (expense), net	0		0		0		0
Interest income (expense), net	(35)		5		(35)		12
Income (loss) from continuing operations before provision for income taxes	(139)		(498)		(721)		(1,511)
Accounts receivable, net	6,600		6,937		6,600		6,937
Long-lived assets, net of accumulated depreciation and amortization	1,084		770		1,084		770
Total assets	20,552		26,255		20,552		26,255
Hudson Asia Pacific
Segment Reporting Information [Line Items]
Revenue, from external customers	66,990		58,274		188,522		177,344
Inter-segment revenue	0		0		0		0
Total revenue	66,990		58,274		188,522		177,344
Gross margin, from external customer	24,654		21,348		70,083		67,117
Inter-segment gross margin	(57)		(28)		(125)		(71)
Gross margin	24,597		21,320		69,958		67,046
Business reorganization expenses (recovery)	140		0		1,255		102
EBITDA (loss)	250	[2]	(125)	[2]	(635)	[2]	(772)	[2]
Depreciation and amortization	918		758		2,465		2,414
Intercompany interest income (expense), net	0		(559)		0		(1,827)
Interest income (expense), net	(74)		(58)		(154)		(148)
Income (loss) from continuing operations before provision for income taxes	(742)		(1,500)		(3,254)		(5,161)
Accounts receivable, net	30,775		28,883		30,775		28,883
Long-lived assets, net of accumulated depreciation and amortization	9,674		10,193		9,674		10,193
Total assets	57,773		65,829		57,773		65,829
Hudson Europe
Segment Reporting Information [Line Items]
Revenue, from external customers	69,252		68,253		217,556		205,720
Inter-segment revenue	68		35		174		78
Total revenue	69,320		68,288		217,730		205,798
Gross margin, from external customer	25,463		24,461		84,041		75,676
Inter-segment gross margin	55		26		90		86
Gross margin	25,518		24,487		84,131		75,762
Business reorganization expenses (recovery)	421		152		444		2,579
EBITDA (loss)	(2,292)	[2]	(697)	[2]	(491)	[2]	(6,963)	[2]
Depreciation and amortization	301		366		1,006		1,189
Intercompany interest income (expense), net	(131)		(181)		(393)		(398)
Interest income (expense), net	3		2		(9)		20
Income (loss) from continuing operations before provision for income taxes	(2,721)		(1,242)		(1,899)		(8,530)
Accounts receivable, net	45,741		46,965		45,741		46,965
Long-lived assets, net of accumulated depreciation and amortization	2,654		5,051		2,654		5,051
Total assets	64,851		75,086		64,851		75,086
Corporate
Segment Reporting Information [Line Items]
Revenue, from external customers	0		0		0		0
Inter-segment revenue	0		0		0		0
Total revenue	0		0		0		0
Gross margin, from external customer	0		0		0		0
Inter-segment gross margin	0		0		0		0
Gross margin	0		0		0		0
Business reorganization expenses (recovery)	233		368		234		762
EBITDA (loss)	(1,461)	[2]	(3,221)	[2]	(5,983)	[2]	(6,893)	[2]
Depreciation and amortization	111		161		411		483
Intercompany interest income (expense), net	131		740		393		2,225
Interest income (expense), net	(86)		(95)		(335)		(306)
Income (loss) from continuing operations before provision for income taxes	(1,527)		(2,737)		(6,336)		(5,457)
Accounts receivable, net	0		0		0		0
Long-lived assets, net of accumulated depreciation and amortization	642		456		642		456
Total assets	3,848		7,735		3,848		7,735
Inter-segment elimination
Segment Reporting Information [Line Items]
Revenue, from external customers	0		0		0		0
Inter-segment revenue	(79)		(35)		(222)		(77)
Total revenue	(79)		(35)		(222)		(77)
Gross margin, from external customer	0		0		0		0
Inter-segment gross margin	(1)		2		1		(13)
Gross margin	(1)		2		1		(13)
Business reorganization expenses (recovery)	0		0		0		0
EBITDA (loss)	0	[2]	0	[2]	0	[2]	0	[2]
Depreciation and amortization	0		0		0		0
Intercompany interest income (expense), net	0		0		0		0
Interest income (expense), net	0		0		0		0
Income (loss) from continuing operations before provision for income taxes	0		0		0		0
Accounts receivable, net	0		0		0		0
Long-lived assets, net of accumulated depreciation and amortization	0		0		0		0
Total assets	$ 0		$ 0		$ 0		$ 0

[1] Revenue by geographic region disclosed above is net of any inter-segment revenue and, therefore, represents only revenue from external customers according to the location of the operating subsidiary.

[2] SEC") Regulation S-K 229.10(e)1(ii)(A) defines EBITDA as earnings before interest, taxes, depreciation and amortization. EBITDA is presented to provide additional information to investors about the Company's operations on a basis consistent with the measures that the Company uses to manage its operations and evaluate its performance. Management also uses this measurement to evaluate working capital requirements. EBITDA should not be considered in isolation or as a substitute for operating income and net income prepared in accordance with U.S. GAAP or as a measure of the Company's profitability.

[3] Comprised of property and equipment and intangibles. Corporate assets are included in the United States.