SEGMENT AND GEOGRAPHIC DATA - Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) Segment	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments | Segment			3
Revenue from external customers		$ 26,414	$ 48,704	$ 42,601
Inter-segment revenue		0	0	0
Revenue	$ 24,573	26,414	48,704	42,601
Adjusted net revenue, from external customers		11,659	18,728	21,055
Inter-segment adjusted net revenue		0	0	0
Total adjusted net revenue	8,930	11,659	18,728	21,055
EBITDA (loss)	(522)	(862)	(981)	(2,863)
Depreciation and amortization	(24)	(21)	(48)	(39)
Segment Reporting Information, Intersegment Interest Income (Expense), Net	0	0	0	0
Interest income, net	40	125	119	438
Loss from continuing operations before provision for income taxes	(506)	(758)	(910)	(2,464)
Accounts receivable, net	12,300	14,382	12,300	14,382	$ 12,795
Total assets	44,736	46,133	44,736	46,133	$ 46,704
Operating Segments | Americas
Segment Reporting Information [Line Items]
Revenue from external customers		3,982	5,394	7,122
Inter-segment revenue		28	0	63
Revenue	2,206	4,010	5,394	7,185
Adjusted net revenue, from external customers		3,591	4,753	6,353
Inter-segment adjusted net revenue		26	0	61
Total adjusted net revenue	1,893	3,617	4,753	6,414
EBITDA (loss)	(918)	428	(978)	14
Depreciation and amortization	(5)	(4)	(9)	(9)
Segment Reporting Information, Intersegment Interest Income (Expense), Net	0	0	0	0
Interest income, net	(2)	0	(2)	0
Loss from continuing operations before provision for income taxes	(925)	424	(989)	5
Accounts receivable, net	1,857	3,336	1,857	3,336
Total assets	4,726	4,742	4,726	4,742
Operating Segments | Asia Pacific
Segment Reporting Information [Line Items]
Revenue from external customers		17,454	35,784	26,133
Inter-segment revenue		0	6	0
Revenue	18,833	17,454	35,790	26,133
Adjusted net revenue, from external customers		5,420	9,329	10,010
Inter-segment adjusted net revenue		(28)	6	(58)
Total adjusted net revenue	4,818	5,392	9,335	9,952
EBITDA (loss)	1,025	362	1,362	314
Depreciation and amortization	(13)	(10)	(25)	(15)
Segment Reporting Information, Intersegment Interest Income (Expense), Net	(73)	(100)	(159)	(201)
Interest income, net	0	0	0	0
Loss from continuing operations before provision for income taxes	939	252	1,178	98
Accounts receivable, net	7,514	8,106	7,514	8,106
Total assets	14,349	11,654	14,349	11,654
Operating Segments | Europe
Segment Reporting Information [Line Items]
Revenue from external customers		4,978	7,526	9,346
Inter-segment revenue		2	0	3
Revenue	3,534	4,980	7,526	9,349
Adjusted net revenue, from external customers		2,648	4,646	4,692
Inter-segment adjusted net revenue		3	(6)	3
Total adjusted net revenue	2,219	2,651	4,640	4,695
EBITDA (loss)	300	31	363	(317)
Depreciation and amortization	(5)	(6)	(11)	(13)
Segment Reporting Information, Intersegment Interest Income (Expense), Net	0	0	0	0
Interest income, net	0	0	0	0
Loss from continuing operations before provision for income taxes	295	25	352	(330)
Accounts receivable, net	2,843	3,005	2,843	3,005
Total assets	6,928	6,674	6,928	6,674
Corporate
Segment Reporting Information [Line Items]
Revenue from external customers		0	0	0
Inter-segment revenue		0	0	0
Revenue	0	0	0	0
Adjusted net revenue, from external customers		0	0	0
Inter-segment adjusted net revenue		0	0	0
Total adjusted net revenue	0	0	0
EBITDA (loss)	(929)	(1,683)	(1,728)	(2,874)
Depreciation and amortization	(1)	(1)	(3)	(2)
Segment Reporting Information, Intersegment Interest Income (Expense), Net	73	100	159	201
Interest income, net	42	125	121	438
Loss from continuing operations before provision for income taxes	(815)	(1,459)	(1,451)	(2,237)
Accounts receivable, net	86	(65)	86	(65)
Total assets	18,733	23,063	18,733	23,063
Inter-Segment Elimination
Segment Reporting Information [Line Items]
Revenue from external customers		0	0	0
Inter-segment revenue		(30)	(6)	(66)
Revenue	0	(30)	(6)	(66)
Adjusted net revenue, from external customers		0	0	0
Inter-segment adjusted net revenue		(1)	0	(6)
Total adjusted net revenue	0	(1)	0	(6)
EBITDA (loss)	0	0	0	0
Depreciation and amortization	0	0	0	0
Segment Reporting Information, Intersegment Interest Income (Expense), Net	0	0	0	0
Interest income, net	0	0	0	0
Loss from continuing operations before provision for income taxes	0	0	0	0
Accounts receivable, net	0	0	0	0
Total assets	$ 0	$ 0	$ 0	$ 0