Quarterly report pursuant to Section 13 or 15(d)

Description of Business - Liquidity (Details)

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Description of Business - Liquidity (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Dec. 31, 2022
Description of Business        
Cash, cash equivalents and restricted cash $ 142,401 $ 159,550 $ 44,300 $ 57,826
Cash and cash equivalents 136,225 153,290    
Restricted cash 6,176 6,260    
Short-term restricted cash 160 160    
Long-term restricted cash $ 6,016 $ 6,100    
Substantial Doubt about Going Concern, within One Year false