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CASH AND CASH EQUIVALENTS (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Dec. 31, 2013
Cash and cash equivalents        
Total cash and cash equivalents $ 24,516us-gaap_CashAndCashEquivalentsAtCarryingValue $ 13,459us-gaap_CashAndCashEquivalentsAtCarryingValue $ 9,846us-gaap_CashAndCashEquivalentsAtCarryingValue $ 13,980us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash.        
Cash and cash equivalents        
Total cash and cash equivalents 149us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_CashAndCashEquivalentsAxis
= us-gaap_CashMember		 269us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_CashAndCashEquivalentsAxis
= us-gaap_CashMember		    
Money market fund        
Cash and cash equivalents        
Total cash and cash equivalents $ 24,367us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_CashAndCashEquivalentsAxis
= us-gaap_MoneyMarketFundsMember		 $ 13,190us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_CashAndCashEquivalentsAxis
= us-gaap_MoneyMarketFundsMember