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Fair Value Measurements
 3 Months Ended
Mar. 31, 2022
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
Fair value is defined as the price that would be received from selling an asset, or paid to transfer a liability, in an orderly transaction between market participants at the measurement date. The standard establishes a fair value hierarchy based on the level of independent, objective evidence surrounding the inputs used to measure fair value. A financial instrument’s categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The fair value hierarchy is as follows:
Level 1 — Quoted prices in active markets for identical assets and liabilities.
Level 2 — Quoted prices for identical assets and liabilities in markets that are not active, quoted prices for similar assets and liabilities in active markets or financial instruments for which significant inputs are observable, either directly or indirectly.
Level 3 — Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.
At March 31, 2022 and December 31, 2021, our financial assets and liabilities recorded at fair value on a recurring basis consisted of cash equivalents and available-for-sale debt securities. Cash equivalents consisted of money market funds valued using quoted prices in active markets, which represent Level 1 inputs in the fair value hierarchy. The available-for-sale debt securities were valued using a Monte Carlo simulation, which include inputs that represent Level 3 inputs in the fair value hierarchy.
The carrying amounts of accounts receivable, accounts payable and accrued expenses and other current liabilities approximate fair values because of the short-term nature of these items.
The following tables summarize our assets and liabilities that are measured at fair value on a recurring basis, by level, within the fair value hierarchy (in thousands):

As of March 31, 2022
Level 1Level 2Level 3
Available-for-sale debt securities$— $— $1,182 
Money market fund30,219 — — 
Total assets$30,219 $— $1,182 
Contingent consideration— — 750 
Total liabilities$— $— $750 
 As of December 31, 2021
 Level 1Level 2Level 3
Available-for-sale debt securities
$— $— $1,122 
Money market fund
30,215 — — 
Total assets
$30,215 $— $1,122 
Contingent consideration— — 750 
Total liabilities
$— $— $750 
There was no material change in the fair value of the contingent consideration from our acquisition in October 2020 of Purely Solutions, LLC, for the three months ended March 31, 2022 and year ended December 31, 2021.