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Common stock and convertible preferred stock - Common Stock (Details)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended
Oct. 13, 2020
USD ($)
$ / shares
Oct. 13, 2020
$ / shares
shares
Oct. 06, 2020
$ / shares
shares
Oct. 31, 2020
USD ($)
$ / shares
shares
Mar. 31, 2021
USD ($)
Vote
$ / shares
shares
Dec. 31, 2020
$ / shares
shares
Common stock voting right | Vote         1  
Proceeds from Issuance of Common Stock | $ $ 41,700       $ 105  
Payments Of Underwriting Discounts And Commissions | $ $ 3,100          
Common Stock, Par or Stated Value Per Share | $ / shares         $ 0.0001 $ 0.0001
Common Stock, Shares Authorized | shares         200,000,000 200,000,000
IPO            
Stock Issued | shares     3,250,000 3,757,500    
Share price | $ / shares     $ 12.00 $ 12.00    
Proceeds from Issuance of Common Stock | $       $ 41,700    
Payments Of Underwriting Discounts And Commissions | $       $ 3,100    
Common Stock, Par or Stated Value Per Share | $ / shares     $ 0.0001      
Common Stock, Shares Authorized | shares     200,000,000      
Preferred Stock, Shares Authorized | shares     10,000,000      
Preferred Stock, Par or Stated Value Per Share | $ / shares     $ 0.0001      
Over-Allotment Option            
Stock Issued | shares   487,500   487,500    
Share price | $ / shares $ 12.00 $ 12.00