Shared-Based Compensation - Reconciliation of Option Activity (Detail) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) $ / shares shares
Number of Options (in thousands)
Beginning balance (in shares) | shares	775,000
Granted (in shares) | shares	158,700
Exercised (in shares) | shares	0
Forfeitures or expired (in shares) | shares	(37,000)
Ending balance (in shares) | shares	897,000
Options exercisable (in shares) | shares	600,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Beginning balance (in dollars per share) | $ / shares	$ 13.24
Granted (in dollars per share) | $ / shares	9.44
Exercised (in dollars per share) | $ / shares	0.00
Forfeitures (in dollars per share) | $ / shares	15.10
Ending balance (in dollars per share) | $ / shares	12.49
Options exercisable (in dollars per share) | $ / shares	$ 13.93
Weighted-average remaining contractual term, outstanding	6 years
Weighted- average remaining contractual term, options exercisable	4 years 5 months
Aggregate intrinsic value, exercised | $	$ 0
Aggregate intrinsic value, outstanding | $	0
Aggregate intrinsic value, options exercisable | $	$ 0