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Convertible Series A Preferred Stock (Details) - USD ($)
12 Months Ended
Aug. 10, 2016
Mar. 31, 2015
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Convertible Series A Preferred Stock          
Dividends deemed payable and accrued       $ 0 $ 0
Series A Convertible Preferred Stock.          
Convertible Series A Preferred Stock          
Issuance of convertible Series A preferred stock (shares)   745,637      
Original issue price, per share   $ 6.70585      
Aggregate consideration, cash and noncash   $ 5,000,000      
Cash proceeds from issuance of Series A preferred   1,500,000      
Shares converted 827,205        
Dividend rate     8.00%    
Liquidation preference, per share     $ 6.70585    
Series A Convertible Preferred Stock. | Minimum          
Convertible Series A Preferred Stock          
Liquidation preference upon transfer of voting power, percentage     50.00%    
Percentage of outstanding shares which may require the Company to redeem shares     80.00%    
Redemption price, as a percent of liquidation preference     150.00%    
Series A Convertible Preferred Stock. | Convertible Notes          
Convertible Series A Preferred Stock          
Noncash consideration received, debt converted into stock   $ 3,500,000      
Conversion price percentage of principal and unpaid accrued interest   125.00%