Share-Based Payments - Schedule of Stock Option Activity (Details) - $ / shares	3 Months Ended	12 Months Ended
Mar. 31, 2024	Dec. 31, 2023
Number of Shares
Balances at beginning of period (in shares)	22,057,340
Granted (in shares)	1,237,634
Exercised (in shares)	0
Forfeited (in shares)	(240,000)
Expired (in shares)	(339,425)
Balances at end of period (in shares)	22,715,549	22,057,340
Exercisable at end of period (in shares)	14,261,414
Weighted Average Exercise Price
Balances at beginning of period (in usd per share)	$ 6.90
Granted (in usd per share)	1.43
Exercised (in usd per share)	0
Forfeited (in usd per share)	1.41
Expired (in usd per share)	28.83
Balances at period end (in usd per share)	6.33	$ 6.90
Exercisable, weighted average exercise price, at end of period (in usd per share)	$ 8.93
Weighted Average Remaining Contractual Term (Years)
Balances, weighted average remaining contractual period	7 years 1 month 9 days	7 years 1 month 13 days
Exercisable at period end, weighted average remaining contractual period	6 years 1 month 24 days

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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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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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

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

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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