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Fair Value Measurements
 12 Months Ended
Dec. 31, 2021
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
The following tables present the financial instruments that were measured at fair value on a recurring basis at December 31, 2021 and 2020 by level within the fair value hierarchy (in thousands): 
 December 31, 2021
Level 1Level 2Level 3Total
Money market funds$86,095 $— $— $86,095 
 
December 31, 2020
Level 1
Level 2
Level 3
Total
Money market funds$127,567 $— $— $127,567 
Non-marketable debt security— — 1,000 1,000 
       Total $127,567 $— $1,000 $128,567 
During the years ended December 31, 2021 and 2020, we did not recognize any significant credit losses nor other-than-temporary impairment losses on non-marketable securities.