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Deferred Revenue and Other Contract-Related Liabilities (Tables)
6 Months Ended
Jun. 30, 2018
Revenue Recognition and Deferred Revenue [Abstract]  
Deferred Revenue, by Arrangement, Disclosure [Table Text Block]
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
$
173,804

 
$
238,604

 
$
92,500

 
$
14,591

 
$
519,499

Changes in deferred revenue for the six months ended June 30, 2018 were as follows:
 
Six Months Ended 
 June 30, 2018
Deferred revenue, beginning of the period
$
11,589

  Revenue deferred during the period
4,853

  Recognition of revenue deferred in prior periods
(5,121
)
     Deferred revenue, end of the period
$
11,321

Deferred revenue and other contract-related liabilities consist of the following (in thousands):
 
June 30,
2018
 
December 30,
2017
As Adjusted
Accrued customer reimbursements
$
18,745

 
$
16,896

Deferred revenue
11,321

 
11,589

Accrued rebates and incentives
5,190

 
3,598

Other contract-related liabilities
481

 
259

     Total deferred revenue and other contract-related liabilities
35,737

 
32,342

Less: Non-current portion of deferred revenue
(747
)
 
(237
)
     Deferred revenue and other contract-related liabilities - current
$
34,990

 
$
32,105