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Revenue Recognition (Tables)
12 Months Ended
Dec. 31, 2018
Disaggregation of Revenue
Revenues for the years ended December 31, 2018, 2017 and 2016 were as follows (amounts in thousands, except percentages):
 
 
 
For the Years Ended December 31,
 
 
 
2018
 
 
2017
 
 
2016
 
 
 
(Amounts in thousands)
 
Product Revenue
 
$
193,891
 
 
$
141,089
 
 
$
104,441
 
Royalty and other income
 
 
141
 
 
 
147
 
 
 
100
 
Total revenue
 
$
194,032
 
 
$
141,236
 
 
$
104,541
 
Revenue from Significant Customers
Revenue from significant customers is as follows (amounts in thousands):
 
 
 
For the Years Ended December 31,
 
 
 
2018
 
 
2017
 
 
2016
 
MilliporeSigma
 
$
29,843
 
 
$
25,061
 
 
$
28,856
 
GE Healthcare
 
$
29,616
 
 
$
30,150
 
 
$
30,366
 
Summary of Receivables and Deferred Revenue from Contracts with Customers
The following table provides information about receivables and deferred revenue from contracts with customers as of December 31, 2018 (amounts in thousands):
 
 
 
2018
 
Balances from contracts with customers only:
 
 
 
 
Accounts receivable
 
$
33,015
 
Deferred revenue
 
 
1,290
 
Revenue recognized during the three-month period ending December 31, 2018 relating to:
 
 
 
 
The beginning deferred revenue balance
 
$
422
 
Changes in pricing related to products or services satisfied in previous periods