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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES | 12 Months Ended
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Dec. 29, 2017
Valuation and Qualifying Accounts [Abstract] |
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] | SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
Column A |  | Column B |  | Column C |  | Column D |  | Column E |
|  | Balance at |  |  |  |  |  | Balance at |
|  | Beginning |  |  |  |  |  | End of |
Description |  | of Year |  | Additions |  | Deductions |  | Year |
|  | (In thousands) |
2017 |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts and sales returns deducted from accounts receivable in the balance sheet |  | $ | 2,056 |  | $ | 483 |  | $ | 8 |  | $ | 2,531 |
Deferred tax asset valuation allowance |  |  | 57,446 |  |  | 2,253 |  |  | 19,043 |  |  | 40,656 |
|  | $ | 59,502 |  | $ | 2,736 |  | $ | 19,051 |  | $ | 43,187 |
2016 |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts and sales returns deducted from accounts receivable in the balance sheet |  | $ | 1,877 |  | $ | 206 |  | $ | 27 |  | $ | 2,056 |
Deferred tax asset valuation allowance |  |  | 53,333 |  |  | 4,513 |  |  | 400 |  |  | 57,446 |
|  | $ | 55,210 |  | $ | 4,719 |  | $ | 427 |  | $ | 59,502 |
2015 |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts and sales returns deducted from accounts receivable in the balance sheet |  | $ | 1,589 |  | $ | 345 |  | $ | 57 |  | $ | 1,877 |
Deferred tax asset valuation allowance |  |  | 54,104 |  |  | 2,249 |  |  | 3,020 |  |  | 53,333 |
|  | $ | 55,693 |  | $ | 2,594 |  | $ | 3,077 |  | $ | 55,210 |

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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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Namespace Prefix: | us-gaap_
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- References No definition available. + Details
Name: | us-gaap_ValuationAndQualifyingAccountsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration