Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Narrative) (Details)

v3.21.2
Commitments and Contingencies (Narrative) (Details)
Jun. 28, 2021
USD ($)
$ / shares
shares
Oct. 29, 2020
USD ($)
item
Sep. 30, 2021
USD ($)
shares
Dec. 31, 2020
USD ($)
shares
Aug. 28, 2020
USD ($)
Commitments and Contingencies [Line Items]          
Private placement investment $ 32,000,000.0        
Warrants purchase period 5 years        
Additional common shares available to purchase during warrant period $ 32,000,000.0        
Preferred Stock, Value, Issued      
Common stock, shares outstanding | shares     9,720,627 9,321,927  
Term of company prohibited from conducting new equity offering 30 days        
Convertible Preferred Stock [Member]          
Commitments and Contingencies [Line Items]          
Per share conversion price of preferred stock. | $ / shares $ 3.40        
PIPE Investors [Member]          
Commitments and Contingencies [Line Items]          
Percentage right to purchase equity securities in future 25.00%        
Right to purchase equity securities in future, term 1 year        
Lock-up agreement term 30 days        
PIPE Investors [Member] | Assuming Conversion Of Series A Convertible Preferred Stock [Member]          
Commitments and Contingencies [Line Items]          
Common stock, shares outstanding | shares 9,410,000        
Percent of outstanding common stock 27.00%        
PIPE Investors [Member] | Assuming Exercise Of All Warrants For Cash [Member]          
Commitments and Contingencies [Line Items]          
Common stock, shares outstanding | shares 18,800,000        
Percent of outstanding common stock 43.00%        
Line of Credit [Member]          
Commitments and Contingencies [Line Items]          
Line of credit, maximum borrowing capacity         $ 5,000,000
Letter of Credit [Member]          
Commitments and Contingencies [Line Items]          
Line of credit, maximum borrowing capacity   $ 2,000,000      
Ability to obtain letter of credit, number of letters of credit | item   1