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Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2017
Valuation and Qualifying Accounts [Abstract] |
Valuation and Qualifying Accounts | VICOR CORPORATION SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS Years ended December 31, 2017, 2016, and 2015
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, 2017 |  | $ | 153,000 |  |  | $ | 6,000 |  |  | $ | — |  |  | $ | 159,000 |
December 31, 2016 |  |  | 171,000 |  |  |  | (22,000 | ) |  |  | 4,000 |  |  |  | 153,000 |
December 31, 2015 |  |  | 183,000 |  |  |  | 18,000 |  |  |  | (30,000 | ) |  |  | 171,000 |
(1) | Reflects uncollectible accounts written off, net of recoveries.

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -URI http://asc.fasb.org/topic&trid=2122369 + Details
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- References No definition available. + Details
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