Aggregate number of common shares reserved for future issuance.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of additional shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Stock-Based Compensation - Additional Information (Detail) - USD ($)	12 Months Ended		127 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Jun. 06, 2011
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for future issuance	10,529,240		10,529,240
Unrecognized compensation expense related to stock options	$ 0		$ 0
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expense	$ 3,600,000		3,600,000
Unrecognized stock-based compensation expense, weighted average period of recognition	2 years 10 months 24 days
Granted	288,368
Grant fair value	$ 14.64
Repurchase of common stock (in shares)	82,351	171,641
Performance Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expense	$ 1,100,000		$ 1,100,000
Unrecognized stock-based compensation expense, weighted average period of recognition	1 year
Granted		200,000
Grant fair value		$ 6.38
Realized tax benefit	$ 0
2011 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for future issuance				400,000
Number of shares available for grant				859,956
Increase in shares of common stock authorized for issuance			4,400,000
2007 Plan and 2010 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares available for grant				459,956