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Fair Value Measurements
3 Months Ended
Mar. 31, 2023
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
The following tables present a summary of fair value measurements for financial instruments at March 31, 2023 and December 31, 2022, respectively:
March 31, 2023Level 1Level 2Level 3
Total fair
value
(in thousands)
U.S. government and government agencies$— $185,389 $— $185,389 
Corporate debt securities— 106,285 — 106,285 
Warrants receivable— — 900 900 
Total assets at fair value$— $291,674 $900 $292,574 
December 31, 2022Level 1Level 2Level 3
Total fair
value
(in thousands)
U.S. government and government agencies$— $228,467 $— $228,467 
Corporate debt securities— 98,399 — 98,399 
Warrants receivable— — 900 900 
Total assets at fair value$— $326,866 $900 $327,766 
There were no changes in the balances of Clover's Level 3 financial assets and liabilities during the three months ended March 31, 2022. The changes in balances of Clover's Level 3 financial assets and liabilities during the three months ended March 31, 2023 were as follows:

Warrants receivableTotal
(in thousands)
Balance, December 31, 2022
$900 $900 
Receipts— — 
Settlements— — 
Transfers in— — 
Transfers out— — 
Total realized losses (gains)— — 
Balance, March 31, 2023
$900 $900 
There were no transfers in or out of Level 3 financial assets or liabilities for the three months ended March 31, 2023 or March 31, 2022.

Private Warrants

At March 31, 2023, the Company had exercisable private warrants which were embedded in several agreements as derivatives. These private warrants were accounted for as assets in accordance with ASC 815-40 and are presented within Other assets, non-current on the Consolidated Balance Sheets. The warrant assets are measured at fair value at inception and on a recurring basis until redeemed, with changes in fair value presented within Change in fair value of warrants within the Consolidated Statements of Operations and Comprehensive Loss. These private warrants were classified within Level 3 due to the subjectivity and use of estimates in the calculation of their fair value. These warrants at initial measurement date, December 31, 2022, were assessed to have a fair value of $0.9 million. At March 31, 2023, these warrants had a fair value of $0.9 million.