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Convertible Instruments (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
6 Months Ended 0 Months Ended 0 Months Ended 1 Months Ended 0 Months Ended 1 Months Ended 0 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 12, 2013
Jun. 12, 2013
Convertible A-1 and A-2 Preferred Stock [Member]
IPO [Member]
Jun. 12, 2013
Series A-1 Preferred Stock [Member]
IPO [Member]
Jun. 12, 2013
Series A-2 Preferred Stock [Member]
IPO [Member]
Jun. 12, 2013
Preferred Class A [Member]
IPO [Member]
Submittal Exchange [Member]
Jun. 12, 2013
Convertible Debentures [Member]
Dec. 31, 2012
Convertible Debentures [Member]
Jun. 30, 2014
Convertible Debentures [Member]
Dec. 31, 2013
Convertible Debentures [Member]
Jun. 12, 2013
Convertible Debentures [Member]
IPO [Member]
Interest Expense [Member]
Dec. 31, 2012
Convertible Debentures [Member]
Common Stock [Member]
Jun. 12, 2013
Convertible Debentures [Member]
Common Stock [Member]
IPO [Member]
Class of Stock [Line Items]                            
Stated interest rate                   8.00%        
Issuance of common shares                 $ 12,392          
Shares issued in debt conversion                         826 443
Unamortized debt discount                     1,934      
Issuance of common stock upon conversion of debentures 0 16,784           5,865            
PIK interest               778            
Offering price per share     $ 15.00                      
Recognition of unamortized debt discount upon conversion                       $ 863    
Shares converted into stock         0.35211 0.35211 0.5              
Shares converted into stock       5,336     963              
Shares issued for preferred stock dividends       412