Annual report pursuant to Section 13 and 15(d)

Personnel Costs - Additional Information (Details)

v3.20.4
Personnel Costs - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Schedule Of Personnel Cost Allocation [Line Items]    
Personnel costs $ 35,302,000 $ 12,648,000
Collective Italian National Labor Agreement    
Schedule Of Personnel Cost Allocation [Line Items]    
Percentage of employees subject to agreement 30.00%  
Agreement expiration date Dec. 31, 2023  
RSUs compensation    
Schedule Of Personnel Cost Allocation [Line Items]    
Personnel costs $ 19,100,000 $ 996,000