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Summary of Significant Accounting Policies - Accounts Receivable (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Jan. 02, 2016 | Jan. 03, 2015
Roll forward of the accounts receivable allowance |  |  |
Balance at beginning of period | $ 3,648 |  |
Increases to reserves | 666 | $ (480) | $ (2,996)
Balance at end of period | 4,253 | 3,648 |
Billed Revenues |  |  |
Roll forward of the accounts receivable allowance |  |  |
Balance at beginning of period | 3,648 | 4,177 |
Increases to reserves | 2,761 | 2,361 |
Amounts written off | (2,156) | (2,881) |
Effects of foreign currency translation |  | (9) |
Balance at end of period | 4,253 | 3,648 | 4,177
Unbilled Revenues |  |  |
Roll forward of the accounts receivable allowance |  |  |
Balance at beginning of period | 2,354 | 2,233 |
Increases to reserves | 2,102 | 2,832 |
Amounts written off | (2,736) | (2,711) |
Balance at end of period | $ 1,720 | $ 2,354 | $ 2,233

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- Definition Amount of expense related to write-down of receivables (not charged to revenue and effect of foreign currency translation) to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References No definition available. + Details
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- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5074-111524 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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