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Fair Value Measurements (Tables)
 3 Months Ended
Apr. 01, 2018
Fair Value Disclosures [Abstract]  
Schedule of financial assets measured at fair value on a recurring basis
The following table presents the Company's financial assets that are measured at fair value on a recurring basis as of April 1, 2018 and December 31, 2017, consistent with the fair value hierarchy provisions of the authoritative guidance (in thousands):
 
 
April 1, 2018
 
December 31, 2017
 
Total
 
Level 1
 
Level 2
 
Level 3
 
Total
 
Level 1
 
Level 2
 
Level 3
Assets:
 

 
 

 
 

 
 

 
 

 
 

 
 

 
 

Money market funds (1)
$
11,912

 
$
5,031

 
$
6,881

 
$
—

 
$
15,635

 
$
7,176

 
$
8,459

 
$
—

Total assets
$
11,912

 
$
5,031

 
$
6,881

 
$
—

 
$
15,635

 
$
7,176

 
$
8,459

 
$
—

_________________
 
(1)               Money market funds are included in cash and cash equivalents on the accompanying consolidated balance sheets as of April 1, 2018 and December 31, 2017.