v3.22.2.2
Description of Business - Narrative (Details)
1 Months Ended 3 Months Ended 9 Months Ended
Oct. 25, 2022
USD ($)
Oct. 24, 2022
USD ($)
extension
term
day
Oct. 31, 2022
facility
Sep. 30, 2022
USD ($)
a
Jun. 30, 2022
USD ($)
Mar. 31, 2022
USD ($)
Sep. 30, 2021
USD ($)
Jun. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
Sep. 30, 2022
USD ($)
a
facility
Sep. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
May 31, 2021
a
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                          
Number of facilities | facility                   4      
Cash and cash equivalents       $ 36,231,000     $ 228,824,000     $ 36,231,000 $ 228,824,000 $ 150,755,000  
Net loss       (23,984,000) $ (28,705,000) $ (30,635,000) $ (17,268,000) $ (32,016,000) $ (28,515,000) (83,324,000) (77,799,000)    
Net cash used in operating activities                   (61,052,000) (81,342,000)    
Accumulated deficit       $ 270,638,000           270,638,000   $ 187,314,000  
Proceeds from debt                   $ 105,759,000 $ 95,709,000    
Subsequent Event                          
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                          
Number of facilities | facility     2                    
Number of extension options | extension   2                      
Extension option, term | day   30                      
Subsequent Event | Note And Loan Agreement | Secured Debt                          
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                          
Principal amount   $ 30,000,000                      
Proceeds from debt $ 15,000,000 15,000,000                      
Proceeds from secured debt to be received provided certain conditions have been met   $ 15,000,000                      
Number of extension options | term   2                      
Extension option, term | day   30                      
Morehead, Kentucky                          
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                          
Area of land | a       10           10     60
Berea, Kentucky | Subsequent Event                          
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                          
Number of facilities | facility     1