Stockholders' Equity and Stock-Based Compensation - Number and Weighted Average Grant-Date Fair Value of Unvested Stock Options (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Unvested options at the beginning of the period, Number of Options	0	0	130,191
Vested options during the period, Number	0	0	(107,100)
Forfeited options during the period, Number	0	0	(345)
Exercised options during the period, Number	0	0	(22,746)
Outstanding Ending Balance, Number of Options	0	0	0
Unvested options at the beginning of the period, Weighted Average Grant-Date Fair Value	$ 0	$ 0	$ 1.54
Vested options during the period, Weighted Average Grant-Date Fair Value	0	0	1.54
Forfeited options during the period, Weighted Average Grant-Date Fair Value	0	0	1.54
Exercised options during the period, Weighted Average Grant-Date Fair Value	0	0	1.54
Unvested options at the end of the period, Weighted Average Grant-Date Fair Value	$ 0	$ 0	$ 0