Quarterly report pursuant to Section 13 or 15(d)

Share Capital - Additional Information (Detail)

v3.22.2.2
Share Capital - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 19, 2022
Aug. 18, 2022
Jun. 24, 2022
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Jun. 23, 2022
Dec. 31, 2021
Fair value adjustment of warrants       $ 0.0 $ 0.2 $ (0.1) $ 0.1    
Stock Option [Member]                  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount       0.1   $ 0.1      
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition           9 months 10 days      
Share based payment arrangement plan modification fair value of award       0.0   $ 0.0      
Share-based compensation arrangement by share-based payment award, award vesting period           3 years      
Share-based compensation expense           $ 0.2      
Stock Option [Member] | Award Modification [Member]                  
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount       0.0 $ 3.5 0.0 $ 3.5    
Restricted Stock Units (RSUs) [Member]                  
Share-based payment arrangement expense       4.4   25.5      
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount       6.0   $ 6.0      
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition           1 year 10 days      
Share based payment arrangement plan modification fair value of award       0.0   $ 0.0      
Share-based compensation arrangement by share-based payment award, award vesting period 1 year                
Share-based compensation arrangement by share-based payment award, number of shares authorized               26,881 363,921
Share-based compensation arrangement by share-based payment award, shares issued in period 27,108                
Share-based compensation arrangement by share-based payment award, equity instruments other than options, vested in period 7,843         220,018      
Share-based compensation arrangement by share-based payment award, equity instruments other than options, expected to vest in period 19,265                
Warrant Liability [Member]                  
Derivative liabilities       $ 0.0   $ 0.0     $ 0.1
Common Stock [Member]                  
Stock Issued Under Recapitalization Transaction Shares           6,072,580,000      
Stock Issued During Period, Shares, New Issues       408,000 0 408 0    
Common Stock [Member] | MPX [Member]                  
Stock Issued During Period, Shares, New Issues   408,000              
Common Stock [Member] | Secured Lenders and Unsecured Lenders [Member]                  
Stock Issued Under Recapitalization Transaction Shares     6,072,580            
Selling, general and administrative expenses                  
Share-based payment arrangement expense       $ 0.2 $ 1.6 $ 2.0 $ 4.9    
Selling, general and administrative expenses | Restricted Stock Units (RSUs) [Member]                  
Share-based payment arrangement expense         $ 0.0   $ 0.0