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Allowance Accounts | 12 Months Ended
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Dec. 31, 2020
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
Allowance Accounts | Note 19 — Allowance Accounts The following table sets forth the activity in our valuation accounts for each of the three years in the period ended December 31, 2020 (in thousands):
| Allowance for Credit Losses |  | Deferred Tax Asset Valuation Allowance
Balance at December 31, 2017 | $ | 2,752 |  |  | $ | 12,337 |
Deductions (1) | (2,752) |  |  | — |
Adjustments (2) | — |  |  | 5,603 |
Balance at December 31, 2018 | — |  |  | 17,940 |
Adjustments (2) | — |  |  | 691 |
Balance at December 31, 2019 | — |  |  | 18,631 |
Additions (3) | 2,684 |  |  | — |
Adjustments (2) (4) | 785 |  |  | 1,091 |
Balance at December 31, 2020 | $ | 3,469 |  |  | $ | 19,722 |
(1)The decrease in allowance for credit losses reflects the write-offs of accounts receivable that are either settled or deemed uncollectible (2)The increase in valuation allowance primarily reflects additional net operating losses in our Robotics segment in the U.K. for which insufficient future taxable income exists to offset the losses. (3)The additions in allowance for credit losses reflect credit loss reserves during 2020. (4)The adjustment in allowance for credit losses reflects provision for current expected credit losses upon the adoption of ASU No. 2016-13 on January 1, 2020. See Note 2 for a detailed discussion regarding our accounting policy on accounts receivable and allowance for credit losses as well as the adoption of ASU No. 2016-13. See Note 9 for a detailed discussion of the valuation allowance related to our deferred tax assets.

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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