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Debt and Warrants - June 2017 Convertible Note (Details) - USD ($)
9 Months Ended
Aug. 02, 2018
Jun. 29, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Debt and Warrants          
Proceeds from issuance of convertible debt     $ 500,000 $ 1,700,000  
Derivative liability         $ 11,000
Convertible promissory note issued June 29,2017          
Debt and Warrants          
Notes payable   $ 2,155,000      
Original issue discount   425,000      
Debt legal fee   30,000      
Proceeds from issuance of convertible debt   $ 1,700,000      
Interest rate (as a percent)   8.00%      
Automatic increase in interest rate at the event of default   17.00%      
Maximum aggregate redemption amount $ 500,000        
Convertible promissory note issued June 29,2017 | Other income and expense          
Debt and Warrants          
Change in fair value of derivative liability     $ 11,000    
Convertible promissory note issued June 29,2017 | Current liabilities          
Debt and Warrants          
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 $ 11,000