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Deferred Revenue and Other Contract-Related Liabilities (Tables) | 3 Months Ended
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Mar. 31, 2018
Revenue Recognition and Deferred Revenue [Abstract] |
Deferred Revenue | Deferred revenue and other contract-related liabilities consist of the following (in thousands):
| March 31, 2018 |  | December 30, 2017
Accrued customer reimbursements | $ | 17,648 |  |  | $ | 16,896 |
Deferred revenue | 12,385 |  |  | 11,589 |
Accrued rebates and incentives | 4,407 |  |  | 3,598 |
Other contract-related liabilities | 281 |  |  | 259 |
Total deferred revenue and other contract-related liabilities | 34,721 |  |  | 32,342 |
Less: Non-current portion of deferred revenue | (212 | ) |  | (237 | )
Deferred revenue and other contract-related liabilities - current | $ | 34,509 |  |  | $ | 32,105 |
As a result, the actual timing of this revenue in future periods may vary, possibly materially, from those reflected in this table.
| Expected Future Revenue By Period (in thousands)
| Less than 1 year |  | Between 1-3 years |  | Between 3-5 years |  | More than 5 years |  | Total
Unrecognized Contract Revenue | $ | 179,650 |  |  | $ | 241,482 |  |  | $ | 92,674 |  |  | $ | 15,412 |  |  | $ | 529,218 |
Changes in deferred revenue for the three months ended March 31, 2018 were as follows:
| Three Months Ended March 31, 2018
Deferred revenue, beginning of the period | $ | 11,589 |
Revenue deferred during the period | 2,873 |
Recognition of revenue deferred in prior periods | (2,077 | )
Deferred revenue, end of the period | $ | 12,385 |

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- Definition Tabular disclosure of the type of arrangements and the corresponding amounts that comprise the current and noncurrent balance of deferred revenue as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 13.A.4(a).Q1) -URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6935-107765 + Details
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