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Debt - June 2017 Convertible debt (Details)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Aug. 02, 2018
USD ($)
Jun. 29, 2017
USD ($)
May 31, 2019
USD ($)
Jun. 30, 2019
USD ($)
Dec. 31, 2018
USD ($)
NotesSeries
item
Jun. 30, 2019
USD ($)
Dec. 31, 2018
USD ($)
NotesSeries
Jun. 30, 2020
USD ($)
Dec. 31, 2019
USD ($)
Jun. 30, 2017
USD ($)
Dec. 31, 2016
USD ($)
Debt                      
Debt Instrument, Face Amount                     $ 12,500,000
Fair value of derivative liability due to repayment of mandatory default   $ 15,000                  
Fair value of derivative liability due to interest rate increase feature   5,000                  
Derivative liability                   $ 20,000  
Maximum aggregate redemption amount $ 500,000                    
Number of notes for which standstill fee paid | NotesSeries         4            
Standstill fee         $ 199,000   $ 63,296        
Increase in principal balance of notes payable         119,000   37,296        
Standstill fee paid in cash         80,000   26,000        
Gains (Losses) on Extinguishment of Debt       $ (2,663,000)   $ (4,605,000)          
Chicago Venture Partners, L.P.                      
Debt                      
Total standstill fee         $ 499,000   $ 499,403        
Number of notes for which standstill fee paid         4   4        
December 2017 Note Convertible debt                      
Debt                      
Debt legal fee   30,000                  
Proceeds from issuance of convertible debt   1,700,000                  
Convertible debt payable               $ 0 $ 0    
Gains (Losses) on Extinguishment of Debt     $ 7,566                
December 2017 Note Convertible debt | Chicago Venture Partners, L.P.                      
Debt                      
Debt Instrument, Face Amount   2,155,000                  
Original issue discount   $ 425,000                  
Interest rate (as a percent)   8.00%