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Warrants (Details) (USD $)
3 Months Ended
Mar. 31, 2014
Warrants (Details) [Line Items]  
Adjustments to Additional Paid in Capital, Warrant Exercised $ 2,500,000
Warrant [Member]
 
Warrants (Details) [Line Items]  
Other Nonoperating Expense $ 2,100,000
Common Stock [Member]
 
Warrants (Details) [Line Items]  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares) 800,000