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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2021
Fair Value Disclosures [Abstract]  
Schedule of Assets Measured at Fair Value on Recurring Basis
The following table sets forth by level within the fair value hierarchy the Company's financial assets that were accounted for at fair value on a recurring basis as of September 30, 2021 and December 31, 2020 (in thousands).
September 30, 2021December 31, 2020
Level 1Level 2Level 3TotalLevel 1Level 2Level 3Total
Assets:
Marketable securities - available for sale$— $87,377 $— $87,377 $— $18,061 $— $18,061 
$— $87,377 $— $87,377 $— $18,061 $— $18,061