Long-Term Incentive Plans - Summary of Information Regarding Restricted Stock Awards (Detail) - Management Incentive Plan [Member] - PSUs [Member]	9 Months Ended
	Sep. 30, 2020 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding, Number of Units, Beginning Balance | shares	305,893
Granted, Number of Units | shares	43,250	[1]
Forfeited, Number of Units | shares	(131,790)
Vested, Number of Units | shares	0
Outstanding, Number of Units, Ending Balance | shares	217,353
Outstanding, Weighted-Average Grant Date Fair Value per unit, Beginning balance | $ / shares	$ 2.15	[2]
Granted, Weighted-Average Grant Date Fair Value per Unit | $ / shares	3.03	[1],[2]
Forfeited, Weighted-Average Grant Date Fair Value per Unit | $ / shares	2.11	[2]
Vested, Weighted-Average Grant Date Fair Value per Unit | $ / shares	0	[2]
Outstanding, Weighted-Average Grant Date Fair Value per unit, Ending balance | $ / shares	$ 2.35	[2]

[1] The aggregate grant date fair value of PSUs issued for the nine months ended September 30, 2020 was $0.1 million based on a calculated fair value price ranging from $2.46 to $3.66 per share

[2] Determined by dividing the aggregate grant date fair value of awards by the number of awards issued.