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Receivables, net (Details) - USD ($) $ in Thousands | Jan. 02, 2021 | Dec. 29, 2019 | [1] | Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017
--- | --- | --- | --- | --- | --- | ---
Current and long-term receivables balances |  |  |  |  |
Accounts receivable | $ 196,990 |  | $ 179,250 |  |
Unbilled accounts receivable | 144,364 |  | 126,165 |  |
Long-term receivables | 3,655 |  | 3,082 |  |
Total receivables | 345,009 |  | 308,497 |  |
Less allowance for doubtful accounts | (2,867) | $ (2,868) | (869) | $ (3,936) | $ 0
Total receivables, net | $ 342,142 |  | $ 307,628 |  |
[1] | Beginning balance for fiscal 2020 reflects the cumulative-effect adjustment recorded in connection with the adoption of ASU 2016-13, “Measurement of Credit Losses on Financial Instruments” on the first day of fiscal 2020. For additional discussion of recently adopted accounting standards, see Note 2 in the notes to the consolidated financial statements.

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- Definition Carrying amount as of the balance sheet date, net of allowance for doubtful accounts, of current and noncurrent accounts receivable due from other than related parties. + References No definition available. + Details
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- Definition Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4531-111522 + Details
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- Definition Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 912 -SubTopic 310 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118261985&loc=d3e55302-109406 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3(c)(3)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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