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Outstanding Debt - Additional Information (Details) - USD ($)
1 Months Ended 12 Months Ended
Mar. 29, 2019
May 23, 2019
Dec. 31, 2019
Jun. 06, 2019
Apr. 30, 2019
Dec. 31, 2018
Sep. 21, 2018
Debt Instrument [Line Items]              
Debt instrument, principal face amount           $ 4,500,000  
Series D Preferred Shares [Member]              
Debt Instrument [Line Items]              
Interest rate 8.00%            
Preferred stock, stated value $ 1,160,000            
Proceeds from exchange of senior secured promissory note 400,000            
Issuance of senior secured promissory note in exchange of preferred stock $ 1,560,000            
Maturity date Apr. 01, 2020            
Senior Secured Promissory Notes [Member]              
Debt Instrument [Line Items]              
Debt instrument, principal face amount       $ 2,000,000      
Interest rate       8.00%      
Senior Secured Notes              
Debt Instrument [Line Items]              
Debt instrument, principal face amount   $ 3,300,000          
Interest rate   8.00%          
Maturity period   6 months          
Senior Secured Convertible Notes              
Debt Instrument [Line Items]              
Debt instrument, principal face amount             $ 9,400,000
Interest rate             8.00%
Debt instrument maturity start date     Dec. 31, 2018        
Debt instrument maturity end date     Mar. 31, 2021        
8.0% 2018 Notes [Member] | Short Term Notes Payable [Member]              
Debt Instrument [Line Items]              
Debt instrument, notice of default description     Company received notices of default from the investors in the 2018 Notes which resulted in a 25%, or $1.1 million, increase in principal and an increase in the interest rates from 8% to 18%.        
Debt instrument, default amount percentage         25.00%    
Debt instrument, default amount         $ 1,100,000    
Increase in interest rate on notes in event of default         18.00%    
Series D Warrants [Member]              
Debt Instrument [Line Items]              
Number of common shares issuable on cancellation of warrants       5,605      
Pre-Funded Series D Warrants [Member]              
Debt Instrument [Line Items]              
Number of common shares issuable on cancellation of warrants       100,000