CREDIT AGREEMENTS (Details) € in Thousands, £ in Thousands, SGD in Thousands, NZD in Thousands, AUD in Thousands, $ in Thousands			3 Months Ended	9 Months Ended
	Sep. 15, 2017 GBP (£)	Aug. 01, 2014 GBP (£)	Sep. 30, 2017 NZD	Sep. 30, 2017 USD ($)	Sep. 30, 2017 SGD	Sep. 30, 2017 GBP (£)	Sep. 30, 2017 AUD	Sep. 30, 2017 USD ($)	Sep. 30, 2017 EUR (€)	Sep. 15, 2017 USD ($)	Sep. 15, 2016 GBP (£)	Sep. 15, 2016 USD ($)	Aug. 01, 2014 USD ($)
Lloyds
Line of Credit Facility [Line Items]
Debt Instrument, Term				2 years
Line of Credit Facility, Maximum Borrowing Capacity	£ 10,000	£ 15,000								$ 13,399	£ 12,000	$ 16,079	$ 20,099
Line Of Credit Facility, Minimum Month-End Excess Availability	£ 1,500									2,010	2,000	2,680
Line of Credit Facility, Current Borrowing Capacity								$ 7,149
Line of credit facility, covenant, maximum credit dilution				5.00%
Additional borrowing availability								$ 5,276
Interest rates on outstanding borrowing			2.00%		2.00%	2.00%	2.00%	2.00%	2.00%
Minimum availability required						£ 1,500		$ 2,010
Debt Instrument, Renewal Term	1 year	3 months
Debt Instrument, Rolling Period				3 months
Lloyds | Credit Facility Lending based on Billed Revenue [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	£ 9,500									12,729	£ 11,500	$ 15,409
Eligible work in progress temporary receivables	83.00%
Lloyds | Credit Facility Lending based on Unbilled Revenue [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	£ 500									$ 670
Eligible work in progress permanent receivables	25.00%
Lloyds
Line of Credit Facility [Line Items]
Debt Turns in days				55
National Australia Bank Limited and Bank of New Zealand [Member] | Financial Guarantee Facility
Line of Credit Facility [Line Items]
Financial guarantee capacity							AUD 3,000	$ 2,350
Debt Instrument, Fee Percent				1.50%
Interest rates on financial guarantee requested			1.50%		1.50%	1.50%	1.50%	1.50%	1.50%
National Australia Bank Limited and Bank of New Zealand [Member] | Australian Receivables Facility [Member] [Domain]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity							AUD 4,000	$ 3,133
National Australia Bank Limited [Member] | Financial Guarantee Facility
Line of Credit Facility [Line Items]
Debt Instrument, Fee Percent				0.30%
Lending Arrangements Belgium, Netherlands, Singapore, and Mainland China Banks | Overdraft Facility
Line of Credit Facility [Line Items]
Line of credit facility, average outstanding amount				$ 11,771
Debt, weighted average interest rate			3.04%		3.04%	3.04%	3.04%	3.04%	3.04%
Lending Arrangements Netherlands and Belgium Banks | Overdraft Facility | EURIBOR
Line of Credit Facility [Line Items]
Interest rates on outstanding borrowing			2.75%		2.75%	2.75%	2.75%	2.75%	2.75%
Base Rate | Lloyds
Line of Credit Facility [Line Items]
Debt instrument, interest rate increase				1.75%
Singapore Subsidiary | Overdraft Facility | Singapore Prime Rate
Line of Credit Facility [Line Items]
Debt instrument, interest rate increase				1.75%
Singapore Subsidiary | Lending Arrangements Singapore Bank
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity					SGD 200			$ 147
Additional borrowing availability					SGD 168			$ 124
Lending arrangement expiration				1 year
Singapore Subsidiary | Lending Arrangements Singapore Bank | Overdraft Facility | Singapore Prime Rate
Line of Credit Facility [Line Items]
Interest rates on outstanding borrowing			6.00%		6.00%	6.00%	6.00%	6.00%	6.00%
NEW ZEALAND | National Australia Bank Limited and Bank of New Zealand [Member] | New Zealand Receivables Agreement [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			NZD 5,000					$ 3,605
LIne of Credit Facility, Notice Period				90 days
Line of Credit Facility, Current Borrowing Capacity								2,075
Additional borrowing availability								$ 2,075
Interest rates on outstanding borrowing			3.99%		3.99%	3.99%	3.99%	3.99%	3.99%
Debt Instrument, Fee Amount			NZD 1					$ 1
Australia | National Australia Bank Limited and Bank of New Zealand [Member] | Australian Receivables Facility [Member] [Domain]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity							AUD 25,000	19,583
Line of Credit Facility, Current Borrowing Capacity								17,753
Debt instrument, interest rate increase				1.50%
Additional borrowing availability								$ 11,444
Interest rates on outstanding borrowing			3.15%		3.15%	3.15%	3.15%	3.15%	3.15%
Debt Instrument, Fee Amount							AUD 6	$ 5
Belgium Subsidiary | Lending Arrangements Belgium Bank | Overdraft Facility
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity								$ 1,181	€ 1,000
LIne of Credit Facility, Notice Period			15 days