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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Mar. 31, 2015
Dec. 31, 2014
Financial instruments        
Cash and cash equivalents $ 29,285 $ 32,774 $ 18,300 $ 16,293
Restricted cash 2,163 2,192    
Notes payable 3,177 0    
Notes payable, fair value 3,177 0    
Foreign currency forward contracts, liabilities 138 255    
Recurring | Level 1        
Financial instruments        
Cash and cash equivalents 29,285 32,774    
Cash and cash equivalents, fair value 29,285 32,774    
Restricted cash 2,163 2,192    
Restricted cash, fair value 2,163 2,192    
Recurring | Level 2        
Financial instruments        
Foreign currency forward contracts, assets 454 163    
Variable interest rate debt 10,832 11,606    
Variable interest rate debt, fair value 10,832 11,606    
Foreign currency forward contracts, liabilities $ 592 $ 418