Stock-Based Compensation - Summary of Unvested Option (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Unvested, options beginning balance	148,920
Granted, options	19,250
Vested, options	(56,297)
Forfeited, options	(470)
Unvested, options ending balance	111,403	148,920
Unvested , weighted average grant date fair value beginning balance	$ 22.07
Granted, weighted average grant date fair value	62.65	$ 25.40	$ 18.25
Vested, weighted average grant date fair value	24.22	15.49	$ 9.99
Forfeited, weighted average grant date fair value	62.65
Unvested , weighted average grant date fair value ending balance	$ 27.83	$ 22.07