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Senior Secured Note and Convertible Notes - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Jun. 27, 2019
May 15, 2018
Jul. 31, 2019
May 31, 2017
Jun. 30, 2019
Jun. 30, 2019
Jun. 30, 2018
Mar. 29, 2018
Jan. 02, 2018
Debt Conversion, Converted Instrument, Amount           $ 2,728      
Debt conversion expense           1,547 $ 0    
Share Price               $ 0.72 $ 1.36
Amortization of Debt Discount (Premium)           871      
Amortization of debt discount and debt issuance costs         $ 342 736      
Wrote off of debt issuance cost         135 135      
Convertible Common Stock [Member] | Third Amendment Agreement [Member]                  
Shares issued on conversion of convertible notes 586,389                
Convertible Debt [Member]                  
Debt Instrument, Interest Rate, Stated Percentage   5.00%              
Aggregate proceeds   $ 4,438              
Debt Instrument, Convertible, Conversion Price   $ 12.40              
Convertible Debt [Member] | Third Amendment Agreement [Member]                  
Debt conversion expense $ 1,547                
Convertible Debt [Member] | Convertible Common Stock [Member] | Third Amendment Agreement [Member]                  
Debt Instrument, Convertible, Conversion Price $ 2.48                
Class A Warrants [Member]                  
Class Of Warrant Or Right Number Of Warrants Issued       250,000          
Class A Warrants [Member] | Convertible Debt [Member]                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   357,863              
Debt Instrument, Convertible, Conversion Price   $ 12.40              
Class B Warrants [Member] | Convertible Debt [Member]                  
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   178,932              
June 2019 Class A Warrants [Member] | Third Amendment Agreement [Member]                  
Warrants issued on conversion of covertible notes 356,772                
Exercise price $ 0.01                
Appraised value of Warrants           689      
Warrant expenses           689      
June 2019 Class A Warrants [Member] | Convertible Common Stock [Member] | Third Amendment Agreement [Member]                  
Shares issued on conversion of convertible notes     354,502            
Rockmore Investment Master Fund Ltd [Member]                  
Debt Instrument, Face Amount     $ 500   $ 6,500 $ 6,500      
Debt Instrument, Interest Rate, Stated Percentage         11.24% 11.24%