RESTRICTED CASH (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 1,259	$ 1,189
Prepaid Expenses and Other Current Assets
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	644	247
Prepaid Expenses and Other Current Assets | Client guarantees
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	155	139
Prepaid Expenses and Other Current Assets | Collateral accounts
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	379	0
Prepaid Expenses and Other Current Assets | Others
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	110	108
Other Noncurrent Assets
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	615	942
Other Noncurrent Assets | Collateral accounts
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	136	557
Other Noncurrent Assets | Rental deposits
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 479	$ 385