Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.22.0.1
Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Jan. 07, 2022
Net Cash Provided by (Used in) Operating Activities $ 16,148 $ (9,828)  
Impairment loss 7,367 203,464  
Net loss (76,248) (313,362)  
Accumulated deficit (800,390) (724,142)  
Debt instrument debt default amount 97,500    
Debt instrument debt default principal amount 60,000    
Debt instrument debt default accrued additional fees and interest 15,400    
Restricted cash 3,334 495  
Impairment of right of use asset 300    
Impairment loss 5,500 4,100  
Impairment loss related to property plant and equipment $ 100 0  
Reporting unit Percentage of fair value in excess of carrying amount 50.00%    
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) $ 5,200    
Impairment Loss on goodwill 0 199,364  
Goodwill 0 0  
Sublease [Member]      
Impairment loss $ 1,800 0  
License [Member]      
Useful life of intangible assets 15 years    
Minimum [Member] | Trademarks [Member]      
Useful life of intangible assets 7 years    
Minimum [Member] | Other Intangible Assets [Member]      
Useful life of intangible assets 1 year    
Maximum [Member]      
Trade accounts receivable, Contractual maturity term 1 year    
Maximum [Member] | Trademarks [Member]      
Useful life of intangible assets 15 years    
Maximum [Member] | Other Intangible Assets [Member]      
Useful life of intangible assets 5 years    
MPX New Jersey LLC [Member]      
Percentage of voting equity interests acquired     100.00%
MPX New Jersey LLC [Member] | Subsequent Event [Member]      
Percentage of voting equity interests acquired     100.00%
Recapitalization Transaction [Member]      
Debt instrument face amount $ 14,700    
Secured Debt [Member]      
Debt Instrument debt default accrued interest amount 30,900    
Unsecured Debt [Member]      
Debt Instrument debt default accrued interest amount $ 9,600    
Senior Secured Convertible Debentures [Member]      
Debt instrument interest rate 13.00%    
Convertible Unsecured Debentures [Member]      
Debt instrument interest rate 8.00%    
Tranche Four Secured Notes [Member] | Funds Held In Escrow [Member]      
Restricted cash $ 3,300 $ 500