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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2021
Fair Value Disclosures [Abstract]  
Fair Value Hierarchy for Assets and Liabilities Measured at Fair Value on Recurring Basis
The following table presents our fair value hierarchy for assets measured at fair value on a recurring basis as of September 30, 2021 and December 31, 2020 (in thousands):
 
 Fair value as of September 30, 2021
 TotalLevel 1Level 2Level 3
Assets:
Cash equivalents (money market funds)$33,904 $33,904 $— $— 
$33,904 $33,904 $— $— 
 
 Fair value as of December 31, 2020
 TotalLevel 1Level 2Level 3
Assets:
Cash equivalents (money market funds)$26,901 $26,901 $— $— 
$26,901 $26,901 $— $—