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Allocated Share Based Compensation Expense Income

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Estimated Contract Termination Period

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Redeemable Common Stock, Shares

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Stock Based Awards Liability Non Current.

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- Definition

Temporary Equity

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

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Aggregate number of common shares reserved for future issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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

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Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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The difference between the carrying amount of a financial instrument subject to a registration payment arrangement recorded as temporary equity prior to adoption of FSP EITF 00-19-2 and the carrying amount reclassified to permanent equity upon the adoption of FSP EITF 00-19-2. Recorded as a cumulative effect adjustment to the beginning balance of retained earnings. Does not apply to registration payment arrangements that are no longer outstanding upon adoption of FSP EITF 00-19-2.

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As of the reporting date, the carrying amount of noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. The noncontrolling interest holder's ownership (or holders' ownership) may be in the form of common shares (regardless of class), limited partnership units (regardless of class), non-preferential membership interests, or any other form of common equity regardless of investee entity legal form.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Date the equity-based award expires, in CCYY-MM-DD format.

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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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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Gross number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of options outstanding, including both vested and non-vested options.

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Number of shares issued under share-based payment arrangement.

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Intrinsic value of outstanding award under share-based payment arrangement. Excludes share and unit options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Number of share options (or share units) exercised during the current period.

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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended		3 Months Ended		12 Months Ended
	Dec. 26, 2019	Nov. 29, 2013	Dec. 31, 2020	Dec. 31, 2019	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation cost			$ 18,400	$ 6,100	$ 22,600		$ 18,400	$ 6,100
Stock-based compensation expense					$ 3,289	$ 75	$ 33,767	$ 13,893	$ 1,720
Options outstanding			4,010,524	2,867,966	3,835,972		4,010,524	2,867,966	2,683,882	2,601,775
Options exercisable			1,700,237		1,576,086		1,700,237
Options outstanding with intrinsic value					$ 248,100
Exercisable, intrinsic value			$ 77,200		$ 112,500		$ 77,200
Options exercised					126,730		81,447	52,000	57,351
Exercises in period, intrinsic value					$ 9,400		$ 4,600	$ 700	$ 700
Liability balance related to Modified Options			36,800	$ 13,000	36,800		36,800	13,000
Stock-based compensation expense and income					800	400	$ 29,600	$ 13,000
Weighted average grant date fair value, grants in period							$ 14.18	$ 5.92	$ 11.06
Shares granted							1,327,432	613,647	407,251
Put Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Redemption of common stock	358,188
Options to acquire common stock	592,399
Termination period	30 days
Redeemable Common Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Temporary equity balance			25,100		24,900		$ 25,100
Unexercisable Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation cost			1,400	1,400	1,400		1,400	$ 1,400
Time and Performance Based Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense					2,300	$ 500	3,300	2,600	$ 1,700
Modified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Temporary equity balance			$ 25,100	10,100			25,100	10,100
Reclassifications of temporary equity								10,700
Modified Stock Options [Member] \| Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense					$ 200		$ 900	0
Options outstanding			79,443		91,433		79,443
Options exercised					12,000		19,443
Liability balance related to Modified Options			$ 6,700	0	$ 7,700		$ 6,700	$ 0
Options issued							60,000
Modified Stock Options [Member] \| One-time Termination Benefits [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense				$ 500
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted		300,000
Vesting period		37 months
Expiration period		Dec. 31, 2016
Restricted Stock [Member] \| Promissory Note [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Notes payable		$ 4,000
Maturity date		Nov. 29, 2022
Debt instrument, interest rate, stated percentage		2.00%
Repayment of promissory note			$ 4,600
2016 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for future issuance			2,202,882		2,243,877		2,202,882