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Valuation and Qualifying Accounts (Notes) | 12 Months Ended
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Dec. 29, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] | 17. Valuation and Qualifying Accounts The following table sets forth activity in Kopin's allowance for doubtful accounts:
Fiscal year ended: | Balance at Beginning of Year |  | Additions Charged to Income |  | Deductions from Reserve |  | Balance at End of Year
December 31, 2016 | $ | 153,000 |  |  | $ | — |  |  | $ | (17,000 | ) |  | $ | 136,000 |
December 30, 2017 | 136,000 |  |  | 13,000 |  |  | — |  |  | 149,000 |
December 29, 2018 | $ | 149,000 |  |  | $ | 268,000 |  |  | $ | (113,000 | ) |  | $ | 304,000 |

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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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