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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Jun. 30, 2015
Dec. 31, 2014
Financial instruments        
Cash and cash equivalents $ 23,368 $ 32,774 $ 22,778 $ 16,293
Restricted cash 2,459 2,192    
Notes payable 228 0    
Notes payable, fair value 228 0    
Foreign currency forward contracts, liabilities (471) 255    
Recurring | Level 1        
Financial instruments        
Cash and cash equivalents 23,368 32,774    
Cash and cash equivalents, fair value 23,368 32,774    
Restricted cash 2,459 2,192    
Restricted cash, fair value 2,459 2,192    
Recurring | Level 2        
Financial instruments        
Foreign currency forward contracts, assets 835 163    
Variable interest rate debt 9,493 11,606    
Variable interest rate debt, fair value 9,493 11,606    
Foreign currency forward contracts, liabilities $ 364 $ 418