Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Schedule of Debt Restructuring as per Restructuring Agreement for Subsequent Periods (Parenthetical) (Detail)

v3.22.1
Subsequent Events - Schedule of Debt Restructuring as per Restructuring Agreement for Subsequent Periods (Parenthetical) (Detail) - USD ($)
$ in Millions
Jan. 06, 2022
Jul. 13, 2020
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]    
Long term incentive program percent 5.75%  
8% Senior Unsecured Debentures [Member]    
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]    
Debt instrument interest rate stated percentage   8.00%
After Consummation of Recapitalization Transaction [member] | 8% Senior Unsecured Debentures [Member]    
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]    
Debt instrument maturity date   five years
Interim Financing [Member] | ICM [member]    
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]    
Proceeds from short term loans   $ 14.7
Restructured Senior Debt [member] | Payment in Kind (PIK) Note [member]    
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]    
Debt instrument interest rate stated percentage   8.00%
Restructured Senior Debt [member] | Secured Convertible Notes [member]    
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]    
Decrease in pricipal balance of debt instrument   $ 85.0
Restructured Senior Debt [member] | After Consummation of Recapitalization Transaction [member]    
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]    
Debt instrument maturity date   five years