Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v3.21.2
Subsequent Events (Details)
$ / shares in Units, $ in Thousands
 1 Months Ended 9 Months Ended 12 Months Ended
Nov. 15, 2021
USD ($)
$ / shares
shares
Nov. 11, 2021
shares
Nov. 10, 2021
$ / shares
shares
Dec. 16, 2021
USD ($)
bonus
Nov. 30, 2021
USD ($)
Oct. 31, 2021
USD ($)
Sep. 30, 2021
USD ($)
$ / shares
shares
Sep. 30, 2020
USD ($)
Dec. 31, 2019
$ / shares
shares
Dec. 31, 2020
$ / shares
shares
Subsequent Event [Line Items]                    
Proceeds from issuance of convertible notes | $             $ 1,560 $ 630    
Exercise price of warrants (in dollars per share) | $ / shares             $ 0.11   $ 2.75 $ 0.11
Period which warrants are exercisable                 4 years  
Warrants outstanding (in shares)             422,549   15,277 422,549
Subsequent Event                    
Subsequent Event [Line Items]                    
Exercise price of warrants (in dollars per share) | $ / shares $ 7.50                  
Period which warrants are exercisable 5 years                  
Warrants outstanding (in shares) 192,500                  
Warrant lock-up period 180 days                  
Proceeds from Initial Public Offering | $ $ 14,939       $ 14,939          
Subsequent Event | Management                    
Subsequent Event [Line Items]                    
Bonus frequency | bonus       1            
Subsequent Event | Management | Chief Executive Officer                    
Subsequent Event [Line Items]                    
Bonus | $       $ 350            
Subsequent Event | Management | Chief Financial Officer                    
Subsequent Event [Line Items]                    
Bonus | $       $ 40            
Subsequent Event | Convertible debt | 2015 Notes                    
Subsequent Event [Line Items]                    
Proceeds from issuance of convertible notes | $           $ 155        
Number of units issued in debt conversion (in shares)     1,497,216              
Subsequent Event | IPO                    
Subsequent Event [Line Items]                    
Shares issued in IPO (in shares)     2,750,000              
Subsequent Event | IPO | Common Stock                    
Subsequent Event [Line Items]                    
Shares issued in IPO, price per share (in dollars per share) | $ / shares     $ 0.0001              
Shares issued per each unit (in shares)     1              
Subsequent Event | IPO | Warrants                    
Subsequent Event [Line Items]                    
Shares issued in IPO, price per share (in dollars per share) | $ / shares     $ 6.00              
Shares issued per each unit (in shares)     1              
Exercise price of warrants (in dollars per share) | $ / shares     $ 6.00              
Period which warrants are exercisable     5 years              
Subsequent Event | Over-Allotment Option                    
Subsequent Event [Line Items]                    
Shares issued in IPO (in shares)   412,500 412,500              
Optional period to purchase additional shares     30 days