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Fair Value Measurements
3 Months Ended
Mar. 31, 2024
Fair Value Disclosures [Abstract]  
Fair Value Measurements
Note 5. Fair Value Measurements
The fair value measurements of our financial assets at March 31, 2024 and December 31, 2023 are summarized as follows:
Fair Value Measurements at March 31, 2024
Level ILevel IILevel IIITotal
 Cash and cash equivalents $14,715 $— $— $14,715 
 Restricted cash665 — — 665 
 Held-to-maturity investments:
Commercial paper— 31,047 — 31,047 
U.S. government agency bonds— 27,493 — 27,493 
State and municipal bonds— 12,246 — 12,246 
Corporate bonds and notes— 177,937 — 177,937 
$15,380 $248,723 $— $264,103 
Fair Value Measurements at December 31, 2023
Level ILevel IILevel IIITotal
Cash and cash equivalents$12,881 $— $— $12,881 
Restricted cash8,583 — — 8,583 
Held-to-maturity investments:
Commercial paper— 35,226 — 35,226 
U.S. government agency bonds— 27,472 — 27,472 
State and municipal bonds— 15,215 — 15,215 
Corporate bonds and notes— 200,661 — 200,661 
$21,464 $278,574 $— $300,038