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Equity and Share-Based Compensation - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share-based compensation expense	$ 703,000	$ 1,528,000
Options exercised during period	90,000	32,200
Proceeds from stock options exercised	$ 615,000	$ 181,000

X

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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