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Deferred Revenue, Income and Remaining Performance Obligations (Tables)
 12 Months Ended
Dec. 31, 2019
Deferred Revenue Disclosure [Abstract]  
Deferred Revenue and Income Summary A summary of the balances as of December 31 follows (in thousands):

 
2019
2018
Products and services not yet delivered
$
271

$
217

Deferred revenue
$
271

$
217


The following presents total net sales by line of business for the years ended December 31 (in thousands):

 
2019
2018
2017
Accelerate Pheno™ revenue
$
9,132

$
5,547

$
4,057

Other revenue
165

123

120

Net sales
$
9,297

$
5,670

$
4,177


The following presents total net sales by products and services for the years ended December 31 (in thousands):

 
2019
2018
2017
Products
$
8,839

$
5,576

$
4,157

Services
458

94

20

Net sales
$
9,297

$
5,670

$
4,177