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Fair Value Measurements
 3 Months Ended
Mar. 31, 2023
Fair Value Disclosures [Abstract]  
Fair Value Measurements FAIR VALUE MEASUREMENTS
The Company records its financial assets and liabilities at fair value. The carrying amounts of certain financial instruments of the Company, including cash and cash equivalents, prepaid expenses and other current assets, accounts payable and accrued liabilities, approximate fair value due to their relatively short maturities.  Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in an orderly transaction between market participants at the reporting date. The accounting guidance establishes a three-tiered hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value as follows:
•Level 1: Inputs that include quoted prices in active markets for identical assets and liabilities.
•Level 2: Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
•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.
The following tables set forth the Company’s financial assets and liabilities, measured at fair value on a recurring basis, as of March 31, 2023 and December 31, 2022 (in thousands):
March 31, 2023
Fair Value Measured Using 
(Level 1)(Level 2)(Level 3)Total Balance
Assets    
Cash equivalents:
Money market funds$55,315 $— $— $55,315 
Long-term marketable securities:
Corporate equity securities1,272 — — 1,272 
Total$56,587 $— $— $56,587 
Liabilities
Short-term liabilities:
Contingent consideration$— $— $825 $825 
Long-term liabilities:
Contingent consideration— — 4,089 4,089 
Common stock warrant liability— — 25 25 
Total$— $— $4,939 $4,939 
December 31, 2022
 Fair Value Measured Using 
 (Level 1)(Level 2)(Level 3)Total Balance
Assets    
Cash equivalents:
Money market funds$66,594 $— $— $66,594 
Long-term marketable securities:
Corporate equity securities2,076 — — 2,076 
Total$68,670 $— $— $68,670 
Liabilities
Short-term liabilities:
Contingent consideration$— $— $1,025 $1,025 
Long-term liabilities:
Contingent consideration— — 2,418 2,418 
Common stock warrant liability— — 32 32 
Total $— $— $3,475 $3,475 
The following table presents the issuances, exercises, changes in fair value and reclassifications of the Company’s Level 3 financial instruments that are measured at fair value on a recurring basis (in thousands):
 (Level 3)
Common Stock Warrant Liability and Contingent Consideration
Balance as of December 31, 2022
$3,475 
Change in estimated fair value of common stock warrant liability(7)
Change in estimated fair value of contingent consideration421 
Addition of estimated fair value of contingent consideration1,300 
Payments related to contingent consideration(250)
Balance as of March 31, 2023
$4,939 
During March 2023, the Company wrote off $1.0 million of its investment in convertible preferred shares from a private company which was carried at cost. This private company's operations are in the process of being liquidated. The fair value of this investment was based on Level 3 inputs.     
In determining fair value, the Company uses various valuation approaches within the fair value measurement framework.  The valuation methodologies used for the Company’s instruments measured at fair value and their classification in the valuation hierarchy are summarized below:
•Money market funds – Investments in money market funds are classified within Level 1. Money market funds are valued at the closing price reported by the fund sponsor from an actively traded exchange. At March 31, 2023 and December 31, 2022, money market funds were included as cash and cash equivalents in the condensed consolidated balance sheets.
•Short-term marketable securities – Investments in short-term marketable securities are classified within Level 2. The securities are valued using third-party pricing sources. The pricing services utilize industry standard valuation models, including both income and market-based approaches, for which all significant inputs are observable, either directly or indirectly.
•Long-term marketable equity and debt securities – Investments in long-term marketable equity securities are classified within Level 1. The securities are recorded at fair value based on readily available quoted market prices in active markets. Investments in long-term marketable debt securities are classified within Level 2. The securities are recorded at fair value based on observable inputs for quoted prices for identical or similar assets in markets that are not active. Long-term marketable securities are located within other assets on the condensed consolidated balance sheets.
•Contingent consideration – Contingent consideration is classified within Level 3. Contingent consideration relates to asset acquisitions and business combinations. The Company recorded the estimate of the fair value of the contingent consideration based on its evaluation of the probability of the achievement of the contractual
conditions that would result in the payment of the contingent consideration. Contingent consideration was estimated using the fair value of the milestones to be paid if the contingency is met multiplied by management’s estimate of the probability of success at a discounted rate of 7% and 12% at March 31, 2023 and December 31, 2022, respectively. The significant input in the Level 3 measurement that is not supported by market activity is the Company’s probability assessment of the achievement of the milestones. The value of the liability is subsequently remeasured to fair value at each reporting date, and the change in estimated fair value is recorded as a component of operating expenses until the milestones are paid, expire or are no longer achievable. Increases or decreases in the estimation of the probability percentage result in a directionally similar impact to the fair value measurement of the contingent consideration liability. The carrying amount of the contingent consideration liability represents its fair value. •Common stock warrant liability – Common stock warrant liability is classified within Level 3. The Company utilizes intrinsic value to estimate the fair value of the warrants. The intrinsic value is computed as the difference between the fair value of the Company’s common stock on the valuation date and the exercise price of the warrants. Increases (decreases) in the Company's stock price discussed above result in a directionally similar impact to the fair value of the common stock warrant liability.