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Organization and Business (Details)
 3 Months Ended 9 Months Ended
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
segment
Sep. 30, 2022
USD ($)
May 26, 2017
USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]          
Number of reportable segments | segment     1    
Revenues $ 216,430,000 $ 244,807,000 $ 581,136,000 $ 743,674,000  
Long-Lived Assets 85,718,000 104,709,000 85,718,000 104,709,000  
Note Due 2023 | Convertible Senior Notes          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Principal amount         $ 345,000,000
UNITED STATES          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenues 105,456,000 138,398,000 258,848,000 426,675,000  
Long-Lived Assets 61,788,000 80,496,000 61,788,000 80,496,000  
UNITED KINGDOM          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenues 30,978,000 37,032,000 99,547,000 126,866,000  
Long-Lived Assets 11,233,000 10,762,000 11,233,000 10,762,000  
Outside the United States          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenues 55,247,000 55,084,000 153,358,000 167,504,000  
Long-Lived Assets 12,694,000 13,448,000 12,694,000 13,448,000  
BRAZIL          
Revenues from External Customers and Long-Lived Assets [Line Items]          
Revenues 24,749,000 14,293,000 69,383,000 22,629,000  
Long-Lived Assets $ 3,000 $ 3,000 $ 3,000 $ 3,000