Quarterly report pursuant to Section 13 or 15(d)

Borrowings - Convertible Promissory Note (Details)

v3.21.1
Borrowings - Convertible Promissory Note (Details) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Aug. 31, 2021
Jan. 31, 2021
Dec. 31, 2020
[1]
May 03, 2020
Apr. 29, 2020
Mar. 30, 2020
Feb. 06, 2020
Apr. 18, 2019
Warrants to purchase shares of Common Stock                 4,553 12,756
Price per Unit       $ 3.85            
Debt outstanding $ 562,000       $ 668,000          
Payroll Protection Program Note Agreement                    
Principal amount of debt           $ 847,000        
Interest rate     1.00%              
Convertible debt | March 2020 Private Placement [Member]                    
Period of execution of funding agreement 60 days                  
Period to enter into an underwriting agreement 45 days                  
Threshold period for conversion of notes 45 days                  
Percentage of average of lowest daily VWAPs 90.00%                  
Number of lowest daily VWAPs $ 5                  
Number of trading days for lowest daily VWAPs 20                  
Base conversion price $ 6.40                  
Threshold notice period for payment to investors in cash 3 days                  
Right to pay the investors as a percentage of portion of outstanding principal amount 103.00%                  
Redeemable portion of outstanding principal amount 103.00%                  
Threshold period for conversion of debt 9 months                  
Outstanding principal amount of debt converted $ 102,000                  
Threshold prepayment notice to investor 10 days                  
Threshold prepayment notice to company 5 days                  
Percentage of conversion of principal amount 33.00%                  
Percentage repayments of outstanding principal amount in the event of change of control 105.00%                  
Convertible debt | Maxim Group LLC [Member] | March 2020 Private Placement [Member]                    
Warrants to purchase shares of Common Stock               227,679    
Price per Unit               $ 6.40    
Net proceeds $ 1,700,000                  
Commitment Fee Payable To Investor $ 85,000                  
Convertible debt | Maxim Group LLC [Member] | Maximum | March 2020 Private Placement [Member]                    
Warrants to purchase shares of Common Stock 20,400                  
Notes March 2020                    
Interest expense from amortization of debt discounts $ 0 $ 17,000                
Debt outstanding             $ 2,040,000      
[1] The condensed consolidated balance sheet as of December 31, 2020 was derived from the audited consolidated balance sheet as of that date.