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Consolidated Balance Sheets (Parentheticals) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Preferred stock par value (in Dollars per share) $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock, shares authorized 5,000us-gaap_PreferredStockSharesAuthorized 5,000us-gaap_PreferredStockSharesAuthorized
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, shares authorized 200,000us-gaap_CommonStockSharesAuthorized 200,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 71,955us-gaap_CommonStockSharesIssued 59,092us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 71,955us-gaap_CommonStockSharesOutstanding 59,092us-gaap_CommonStockSharesOutstanding