RESTRICTED CASH (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 989	$ 1,189
Prepaid Expenses and Other Current Assets
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	304	247
Prepaid Expenses and Other Current Assets | Client guarantees
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	190	139
Prepaid Expenses and Other Current Assets | Others
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	114	108
Other Noncurrent Assets
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	685	942
Other Noncurrent Assets | Collateral accounts
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	132	557
Other Noncurrent Assets | Rental deposits
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 553	$ 385