Stock Options and Restricted Stock - Summary of Activity for Restricted Stock Programs (Detail) - $ / shares		3 Months Ended			12 Months Ended
		Mar. 31, 2022		Mar. 31, 2021	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant price per share, cancelled, lower limit		$ 4.89
Grant price per share, cancelled, upper limit		$ 7.25
Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares, beginning balance		493,326	[1]	416,140	416,140
Number of shares, granted		383,925		163,561	258,120
Number of shares, cancelled		(5,747)			(21,940)
Number of shares, vested	[2]	(126,234)			(158,994)
Number of shares, ending balance	[1]	745,270			493,326
Grant price per share, lower range limit beginning balance		$ 4.89	[1]	$ 4.39	$ 4.39
Grant price per share, upper range limit beginning balance		8.40	[1]	7.25	7.25
Grant price per share, granted, lower limit					6.79
Grant price per share, granted, upper limit		7.68			8.40
Grant price per share, cancelled, lower limit		4.89			4.89
Grant price per share, cancelled, upper limit		8.40			7.25
Grant price per share, vested, lower limit	[2]	4.89			4.39
Grant price per share, vested, upper limit	[2]	7.25			7.25
Grant price per share, lower range limit ending balance	[1]	4.89			4.89
Grant price per share, upper range limit ending balance	[1]	8.40			8.40
Weighted average grant price beginning balance		6.87	[1]	$ 6.24	6.24
Weighted average grant price, granted		7.68			7.38
Weighted average grant price, cancelled		7.33			5.98
Weighted average grant price, vested	[2]	6.55			6.16
Weighted average grant price, ending balance	[1]	$ 7.34			$ 6.87

[1] The aggregate fair value of the restricted stock was $6.3 million as of March 31, 2022. The remaining vesting period was 2.9 years at March 31, 2022.

[2] The aggregate fair value of the restricted stock vested was $0.7 million for the three months ended March 31, 2022 and was $0.8 million for the three months ended March 31, 2021.