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Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2019
Valuation and Qualifying Accounts [Abstract] |
Valuation and Qualifying Accounts | VICOR CORPORATION SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS Years ended December 31, 2019, 2018 and 2017
Description |  | Balance at Beginning of Period |  |  | Charge (Recovery) to Costs and Expenses |  |  | Other Charges, Deductions (1) |  |  | Balance at End of Period |
Allowance for doubtful accounts: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Year ended: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2019 |  | $ | 224,000 |  |  | $ | (144,000 | ) |  | $ | (21,000 | ) |  | $ | 59,000 |
December 31, 2018 |  |  | 159,000 |  |  |  | 65,000 |  |  |  | — |  |  |  | 224,000 |
December 31, 2017 |  |  | 153,000 |  |  |  | 6,000 |  |  |  | — |  |  |  | 159,000 |
(1) | Reflects uncollectible accounts written off, net of recoveries.

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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=26873400&loc=d3e24092-122690 + Details
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- References No definition available. + Details
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