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v3.21.2

Condensed Consolidated Statements of Cash Flows Supplemental Information - Significant Non-cash Investing Activities - (Details) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020
Net (decrease) increase in accruals related to: |  |
Investment in equipment supporting joint revenue sharing arrangements | $ 217 | $ (1,897)
Acquisition of other intangible assets | (863) | 69
Purchases of property, plant and equipment | (8) | 158
Net accruals | $ (654) | $ (1,670)

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