Equity Incentive Compensation Plans and Other Long-term Incentive Programs - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2019 $ / shares
Nonvested Equity Shares
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Award vesting period	3 years
Nonvested Equity Common Stock Units
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Award vesting period	1 year
Cash-Based Award
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Award vesting period	3 years
2019 Performance Program
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Performance goal measurement period	3 years
Closing share price (in dollars per share)	$ 2.49
Absolute performance is less than 50%	50.00%
Payout if absolute performance is less than 50%	0.00%
Absolute performance is 50%	50.00%
Payout if absolute performance is 50%	50.00%
Absolute performance is 100%	100.00%
Payout if absolute performance is 100%	100.00%
Relative TSR is less than 30%	30.00%
Payout if relative TSR is less than 30%	0.00%
Relative TSR is 30% or greater	30.00%
Payout if relative TSR is 30% or greater	100.00%
2019 Performance Program | Absolute Performance and Relative TSR | Maximum
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Award vesting rights, percentage	200.00%