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Condensed Consolidated Statements of Cash Flows Supplemental Information - Significant Non-cash Investing Activities - (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Net (decrease) increase in accruals related to:    
Investment in equipment supporting joint revenue sharing arrangements $ (444) $ 409
Acquisition of other intangible assets 21 43
Purchases of property, plant and equipment 536  
Net accruals $ 113 $ 452