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Fair Value of Financial Instruments (Tables)
9 Months Ended
Sep. 30, 2023
Fair Value Disclosures [Abstract]  
Summary of the valuation of cash equivalents and marketable securities by pricing levels
The following table presents the financial instruments and liabilities that are carried at fair value and summarizes their valuation by the respective pricing levels as of September 30, 2023 and December 31, 2022:
 As of September 30, 2023
(In thousands)Total
Quoted Market Prices in Active Markets
 (Level 1)
Significant Other Observable Inputs
 (Level 2)
Significant Unobservable Inputs
 (Level 3)
Assets carried at fair value
Money market funds$14,129 $14,129 $— $— 
Time deposits9,746 — 9,746 — 
U.S. Government bonds and notes143,027 — 143,027 — 
Corporate notes, bonds and commercial paper120,898 — 120,898 — 
Total assets carried at fair value$287,800 $14,129 $273,671 $— 
Liabilities carried at fair value
Earn-out consideration related to PLDA acquisition$11,400 $— $— $11,400 
Total liabilities carried at fair value$11,400 $— $— $11,400 
 As of December 31, 2022
(In thousands)Total
Quoted Market Prices in Active Markets
 (Level 1)
Significant Other Observable Inputs
 (Level 2)
Significant Unobservable Inputs
 (Level 3)
Assets carried at fair value
Money market funds$15,763 $15,763 $— $— 
U.S. Government bonds and notes96,371 — 96,371 — 
Corporate notes, bonds and commercial paper106,355 — 106,355 — 
Total available-for-sale securities$218,489 $15,763 $202,726 $— 
Liabilities carried at fair value
Earn-out consideration related to PLDA acquisition$14,800 $— $— $14,800 
Total liabilities carried at fair value$14,800 $— $— $14,800 
Fair value, liabilities measured on recurring basis, unobservable input reconciliation The following table presents additional information about liabilities measured at fair value for which the Company utilizes Level 3 inputs to determine fair value, as of September 30, 2023 and 2022.
Three Months EndedNine Months Ended
September 30,September 30,
(In thousands)2023202220232022
Balance as of beginning of period$28,600 $12,600 $14,800 $16,900 
Change in fair value of earn-out liability due to remeasurement(5,666)2,411 8,134 (1,889)
Change in fair value of earn-out liability due to achievement of revenue target(11,534)(5,211)(11,534)(5,211)
Balance as of end of period$11,400 $9,800 $11,400 $9,800 
Financial instruments not carried at fair value but requiring fair value disclosure
The following table presents the financial instruments that are not carried at fair value but require fair value disclosure as of December 31, 2022:
 As of December 31, 2022
(In thousands)
Face
 Value
Carrying
 Value
Fair Value
1.375% Convertible Senior Notes due 2023 (the “2023 Notes”)$10,381 $10,378 $19,625