Long-Term Incentive Plans - Summary of Information Regarding Restricted Stock Unit Awards (Detail) - Management Incentive Plan [Member]	3 Months Ended
	Mar. 31, 2020 $ / shares shares
TSUs [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding, Number of Units, Beginning Balance | shares	291,370
Granted, Number of Units | shares	18,250	[1]
Forfeited, Number of Units | shares	(1,244)
Vested, Number of Units | shares	(2,411)
Outstanding, Number of Units, Ending Balance | shares	305,965
Outstanding, Weighted-Average Grant Date Fair Value per unit, Beginning balance | $ / shares	$ 5.18	[2]
Granted, Weighted-Average Grant Date Fair Value per Unit | $ / shares	6.61	[1],[2]
Forfeited, Weighted-Average Grant Date Fair Value per Unit | $ / shares	5.12	[2]
Vested, Weighted-Average Grant Date Fair Value per Unit | $ / shares	5.12	[2]
Outstanding, Weighted-Average Grant Date Fair Value per unit, Ending balance | $ / shares	$ 5.27	[2]
PSUs [Member]
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	18,250	[3]
Forfeited, Number of Units | shares	(1,866)
Vested, Number of Units | shares	0
Outstanding, Number of Units, Ending Balance | shares	322,277
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	[2],[3]
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	$ 2.20	[2]

[1] The aggregate grant date fair value of TSUs issued for the three months ended March 31, 2020 was $0.1 million based on a grant date market price of $6.61 per share.

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

[3] The aggregate grant date fair value of PSUs issued for the three months ended March 31, 2020 was less than $0.1 million based on a calculated fair value price ranging from $2.46 to $3.66 per share.