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Stockholders' Equity - Performance-Based Restricted Stock Units (Narrative) (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024 USD ($) period Rate shares	Mar. 31, 2023 Rate	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($) installment goal shares
Market-Based PRSUs
Stockholders' Equity Capital Structure [Line Items]
Equity instruments granted (in shares) | shares	159,016		35,921	284,282
Equity instruments granted, weighted average grant date fair value | $	$ 9.6		$ 3.1	$ 30.6
PRSUs
Stockholders' Equity Capital Structure [Line Items]
Earnout target percentage (as a percent)	98.00%	58.70%
Number of performance periods | period	3
Term of the performance period (in years)	1 year
Actual total shareholder return (as a percent)	19.95%	(52.64%)
Relative total shareholder return ranking (as a percent)	53.80%
PRSUs | Tranche One
Stockholders' Equity Capital Structure [Line Items]
Award vesting percentage	33.33%
PRSUs | Tranche Two
Stockholders' Equity Capital Structure [Line Items]
Award vesting percentage	66.67%
PRSUs | Payout At The 25th TSR Percentile
Stockholders' Equity Capital Structure [Line Items]
Earnout target percentage (as a percent)		50.00%
PRSUs | Payout At The 55th TSR Percentile
Stockholders' Equity Capital Structure [Line Items]
Earnout target percentage (as a percent)		100.00%
PRSUs | Payout At The 90th TSR Percentile
Stockholders' Equity Capital Structure [Line Items]
Earnout target percentage (as a percent)		200.00%
PRSUs | Minimum
Stockholders' Equity Capital Structure [Line Items]
Earnout target percentage (as a percent)	0	0.00%
PRSUs | Maximum
Stockholders' Equity Capital Structure [Line Items]
Earnout target percentage (as a percent)	2	200.00%
PRSUs | Maximum | Shareholder for Performance Any Period is Negative
Stockholders' Equity Capital Structure [Line Items]
Earnout target percentage (as a percent)	1
PRSUs | Maximum | Executive Employment Terminates due to Death by end of 2024
Stockholders' Equity Capital Structure [Line Items]
Earnout target percentage (as a percent)	1
PRSUs | Maximum | Executive Employment Terminates due to Disability by end of 2024
Stockholders' Equity Capital Structure [Line Items]
Earnout target percentage (as a percent)	0.50
Performance-Based Restricted Stock Units (PRSUs) 2023-2025
Stockholders' Equity Capital Structure [Line Items]
Earnout target percentage (as a percent)	92.50%
Actual total shareholder return (as a percent)	19.95%
Relative total shareholder return ranking (as a percent)	50.50%
Revenue-Based PRSUs
Stockholders' Equity Capital Structure [Line Items]
Equity instruments granted (in shares) | shares				66,167
Equity instruments granted, weighted average grant date fair value | $				$ 6.6
Number of quarterly revenue goals | goal				2
Revenue-Based PRSUs | Tranche One
Stockholders' Equity Capital Structure [Line Items]
Number of quarterly installments | installment				4
Revenue-Based PRSUs | Tranche Two
Stockholders' Equity Capital Structure [Line Items]
Number of quarterly installments | installment				8

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-Topic 718
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-Name Accounting Standards Codification
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