Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies (Cash, Cash Equivalents, and Restricted Cash) (Details)

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Significant Accounting Policies (Cash, Cash Equivalents, and Restricted Cash) (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Jun. 30, 2023
Dec. 31, 2022
Cash and cash equivalents $ 4,268 $ 6,234 $ 15,385  
Restricted cash 375 750 750  
Total cash, cash equivalents and restricted cash 4,643 $ 6,984 $ 16,135 $ 76,656
Assets held for sale, not discontinued operations        
Property, plant and equipment, held for sale $ 2,200