Annual report pursuant to Section 13 and 15(d)

Borrowings - Convertible Promissory Note (Details)

v3.22.0.1
Borrowings - Convertible Promissory Note (Details)
12 Months Ended
Dec. 31, 2021
USD ($)
item
$ / shares
shares
Dec. 31, 2020
USD ($)
Nov. 09, 2020
shares
May 03, 2020
USD ($)
Apr. 29, 2020
USD ($)
Mar. 30, 2020
$ / shares
shares
Warrants to purchase shares of Common Stock | shares     45,534      
Deemed dividend from warrant repricing   $ 134,000        
Debt outstanding   668,000        
Gain on extinguishment of debt $ 859,000          
Payroll Protection Program Note Agreement            
Principal amount of debt       $ 847,000    
Debt Instrument, Interest Rate, Stated Percentage       1.00%    
Convertible debt | March 2020 Private Placement            
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 | $ / shares $ 5          
Number of trading days for lowest daily VWAPs | item 20          
Base conversion price | $ / shares $ 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 | March 2020 Private Placement            
Warrants to purchase shares of Common Stock | shares           227,679
Price per Unit | $ / shares           $ 6.40
Net proceeds $ 1,700,000          
Commitment Fee Payable To Investor $ 85,000          
Convertible debt | Maxim Group LLC | Maximum | March 2020 Private Placement            
Warrants to purchase shares of Common Stock | shares 20,400          
Notes March 2020            
Interest expense from amortization of debt discounts $ 0 $ 1,369,000        
Debt outstanding         $ 2,040,000