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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
CONSOLIDATED BALANCE SHEETS    
Account receivable, allowance $ 0us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 89us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Receivable from a related party $ 10,550us-gaap_DueFromRelatedPartiesCurrent $ 2,247us-gaap_DueFromRelatedPartiesCurrent
Preferred stock, par value (in dollars per share) $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock, shares authorized 230us-gaap_PreferredStockSharesAuthorized 230us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding 0us-gaap_PreferredStockSharesOutstanding 0us-gaap_PreferredStockSharesOutstanding
Common stock, par value (in dollars per share) $ 0.01us-gaap_CommonStockParOrStatedValuePerShare $ 0.01us-gaap_CommonStockParOrStatedValuePerShare
Common stock, authorized shares 200,000us-gaap_CommonStockSharesAuthorized 200,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 116,445us-gaap_CommonStockSharesIssued 111,516us-gaap_CommonStockSharesIssued
Treasury Stock, Shares 150us-gaap_TreasuryStockShares 0us-gaap_TreasuryStockShares