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Fair Value Measurements (Tables)
 6 Months Ended
Jun. 30, 2018
Fair Value Disclosures [Abstract]  
Fair Value Measurements of Financial Assets
The following table provides the fair value measurements of applicable financial assets as of June 30, 2018 and December 31, 2017:
 
Financial assets at fair value
as of June 30, 2018
 
Financial assets at fair value
as of December 31, 2017
(in thousands)
Level 1
 
Level 2
 
Level 3
 
Level 1
 
Level 2
 
Level 3
Assets:
 
 
 
 
 
 
 
 
 
 
 
Cash equivalents(1)
$
2,010

 
$
—

 
$
—

 
$
1,895

 
$
—

 
$
—

Total assets
$
2,010

 
$
—

 
$
—

 
$
1,895

 
$
—

 
$
—

 
(1) 
Cash equivalents as of June 30, 2018 and December 31, 2017 consisted of institutional money market funds. The carrying value of our money market funds approximates fair value due to their short-term maturities.