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Net Loss Per Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Equity [Abstract]    
Net loss $ (7,239)us-gaap_NetIncomeLoss $ (16)us-gaap_NetIncomeLoss
Basic and diluted weighted average shares outstanding (in shares) 22,694,003us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted 8,888us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted
Basic and diluted net loss per share (in dollars per share) $ (0.32)us-gaap_EarningsPerShareBasicAndDiluted $ (1.80)us-gaap_EarningsPerShareBasicAndDiluted