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Condensed Consolidated Statements of Cash Flows Supplemental Information - Write-downs (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Write-downs |  |  |  |  |  |  |
Inventories |  | $ 300 | $ 600 | $ 468 | [1] | $ 729 | [1]
Equipment supporting joint revenue sharing arrangements | [2] |  |  | 328 |  | 1,050 |
Other property, plant and equipment |  |  |  | 0 |  | 66 |
Other intangible assets |  |  |  | 63 |  | 132 |
Film assets | [3] |  |  | 19 |  | 10,211 |
Other assets | [4] |  |  | 0 |  | 1,151 |
Write-downs |  |  |  | $ 878 |  | $ 13,339 |
[1] | In the nine months ended September 30, 2021, the Company recorded write-downs of $0.5 million (2020 — $0.7 million) in Costs and Expenses Applicable to Technology Sales related to excess and damaged inventory.
[2] | In the nine months ended September 30, 2021, the Company recorded charges of $0.3 million (2020 — $1.1 million) in Costs and Expenses Applicable to Technology Rentals mostly related to the write-down of leased xenon-based digital systems which were taken out of service in connection with customer upgrades to laser-based digital systems.
[3] | In the nine months ended September 30, 2020, the Company recorded impairment losses of $10.2 million in Costs and Expenses Applicable to Image Enhancement and Maintenance Services principally to write-down the carrying value of certain documentary and alternative film content due to a decrease in projected box office totals and related revenues based on management’s regular quarterly recoverability assessments. To a much lesser extent, the impairment losses also relate to the write-down of DMR related film assets.
[4] | In the nine months ended September 30, 2020, the Company recorded a write-down of $1.2 million in Asset Impairments related to content-related assets which became impaired in the period.

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