Stockholders’ Equity and Stock-Based Compensation - Warrant Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Shares of Stock under Warrants
Beginning balance (in shares)	21,696
Granted (in shares)	0
Exercised (in shares)	0
Canceled (in shares)	0
Ending balance (in shares)	21,696	21,696
Weighted- Average Exercise Price
Beginning balance (in dollars per share)	$ 4.38
Granted (in dollars per share)	0
Exercised (in dollars per share)	0
Canceled (in dollars per share)	0
Ending balance (in dollars per share)	$ 4.38	$ 4.38
Weighted- Average Remaining Contractual Term
Outstanding (in years)	4 years 6 months 14 days	4 years 9 months 10 days
Aggregate Intrinsic Value
Beginning balance	$ 0
Exercised	0
Ending balance	$ 0	$ 0