Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Subsequent Events - Schedule of Debt Restructuring as per Restructuring Agreement for Subsequent Periods (Detail)
$ in Thousands
Jul. 13, 2020
USD ($)
Restructured Senior Debt [Member]  
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]  
Troubled debt restructuring debtor $ 85,000
Restructured Senior Debt [Member] | Secured Lenders [Member]  
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]  
Troubled debt restructuring debtor 85,000
Interim Financing [member]  
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]  
Troubled debt restructuring debtor 14,737
Interim Financing [member] | Secured Lenders [Member]  
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]  
Troubled debt restructuring debtor 14,737
8% Senior Unsecured Debentures [Member]  
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]  
Troubled debt restructuring debtor 20,000
8% Senior Unsecured Debentures [Member] | Secured Lenders [Member]  
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]  
Troubled debt restructuring debtor 5,000
8% Senior Unsecured Debentures [Member] | Unsecured Debentureholders [Member]  
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]  
Troubled debt restructuring debtor $ 15,000
Proforma Common Equity [Member]  
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]  
Troubled debt restructuring debtor percentage 100.00%
Proforma Common Equity [Member] | Secured Lenders [Member]  
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]  
Troubled debt restructuring debtor percentage 48.625%
Proforma Common Equity [Member] | Unsecured Debentureholders [Member]  
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]  
Troubled debt restructuring debtor percentage 48.625%
Proforma Common Equity [Member] | Existing Shareholders [Member]  
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]  
Troubled debt restructuring debtor percentage 2.75%