Stock-based Compensation - General Information (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2021	Dec. 31, 2020
Stock-based Compensation
Stock-based compensation expense	$ 0	$ 0
Remaining stock-based compensation expense for unvested restricted stock units	$ 2,200
Restricted Stock Units (RSUs)
Stock-based Compensation
Vesting period	3 years
Share-based Payment Arrangement, Option
Stock-based Compensation
Vesting period	1 year

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

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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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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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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