Stock-Based Compensation - Summary of Stock Option Activity (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Summary Of Stock Option Activities [Line Items]
Options Outstanding, Exercised	(2,420)	(19,606)
Stock Options [Member]
Summary Of Stock Option Activities [Line Items]
Options Outstanding, Beginning balance, Shares	16,250	150,246
Options Outstanding, Exercised	(6,000)	(61,767)
Options Outstanding, Forfeited	0	(188)
Options Outstanding, Cancelled/expired	(6,250)	(72,041)
Options Outstanding, Ending balance, Shares	4,000	16,250
Options Exercisable, Ending balance, Shares	3,916	15,620
Options Outstanding, Beginning balance, Weighted Average Exercise Price	$ 6.54	$ 7.11
Weighted Average Exercise Price, Exercised	5.48	7.13
Weighted Average Exercise Price, Forfeited	0	5.00
Weighted Average Exercise Price, Expired or Cancelled	7.89	7.23
Options Outstanding, Ending balance, Weighted Average Exercise Price	6.02	6.54
Options Outstanding, Exercisable at End of Year, Weighted Average Exercise Price	$ 6.00	$ 6.52