Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Details)

v3.21.2
Summary of Significant Accounting Policies - Additional Information (Details)
$ / shares in Units, € in Thousands, $ in Thousands
6 Months Ended
Jun. 30, 2021
USD ($)
Segment
$ / shares
Jun. 30, 2021
EUR (€)
Jan. 28, 2021
$ / shares
Dec. 31, 2020
$ / shares
Oct. 27, 2020
$ / shares
Jun. 10, 2020
$ / shares
Accounting Policies [Line Items]            
Ordinary shares, par value | $ / shares $ 0.01   $ 0.01 $ 0.01   $ 0.01
Number of business segments | Segment 1          
October Offering            
Accounting Policies [Line Items]            
Ordinary shares, par value | $ / shares $ 0.01       $ 0.01  
June 3 SPA            
Accounting Policies [Line Items]            
Ordinary shares, par value | $ / shares 0.01          
June 30 SPA            
Accounting Policies [Line Items]            
Ordinary shares, par value | $ / shares $ 0.01          
Certificates Of Deposit            
Accounting Policies [Line Items]            
Restricted cash $ 60          
Warrants Issued | October Offering            
Accounting Policies [Line Items]            
Restricted cash 11          
Warrants Issued | June 3 SPA            
Accounting Policies [Line Items]            
Restricted cash 17          
Warrants Issued | June 30 SPA            
Accounting Policies [Line Items]            
Restricted cash 6          
Maximum            
Accounting Policies [Line Items]            
Cash, FDIC insured amount 250          
Cash, DGS insured amount $ 119 € 100