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Stockholders' Equity - Preferred Stock Issuances - Additional Information (Details) - USD ($)
Mar. 29, 2019
Nov. 06, 2018
Dec. 31, 2018
Nov. 05, 2018
Dec. 31, 2017
Stockholders Equity Note [Line Items]          
Preferred stock, par value (in dollars per share)     $ 0.01   $ 0.01
Preferred stock, stated value     $ 0   $ 0
Series D Preferred Shares [Member]          
Stockholders Equity Note [Line Items]          
Preferred stock, par value (in dollars per share)       $ 0.01  
Series D Preferred Shares [Member] | Securities Purchase Agreement [Member]          
Stockholders Equity Note [Line Items]          
Preferred stock, shares issued   101      
Series D Preferred Shares [Member] | Common Stock [Member]          
Stockholders Equity Note [Line Items]          
Conversion of common shares   1,655,738      
Series D Preferred Shares [Member] | Subsequent Event [Member]          
Stockholders Equity Note [Line Items]          
Preferred stock, stated value $ 1,160,000        
Proceeds and issued senior secured promissory note 400,000        
Issuance of senior secured promissory note in exchange of preferred stock 1,560,000        
Preferred stock, value outstanding $ 0