XML 35 R21.htm IDEA: XBRL DOCUMENT v3.24.1.u1
FINANCIAL INSTRUMENTS (Tables)
 3 Months Ended
Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]  
Schedule of Cash, Cash Equivalents and Available-for-Sale Securities by Significant Investment Category
The following tables show the Company’s cash, cash equivalents and available-for-sale securities by significant investment category for each period presented:
March 31, 2024
Amortized CostGross
Unrealized
Gains		Gross
Unrealized
Losses		Aggregate Fair ValueCash and Cash Equivalents
Short-term
Marketable
Securities (1)
Long-term
Marketable
Securities (2)
Level 1:
Cash$402,091 $— $— $402,091 $402,091 $— $— 
Level 2:
Money market instruments313,928 — — 313,928 313,928 — — 
Corporate debt securities609,615 1,533 (1,552)609,596 — 177,583 432,013 
U.S. government agency securities218,811 107 (1,165)217,753 14,982 115,568 87,203 
Commercial paper22,005 — — 22,005 15,995 6,010 — 
Asset-backed securities101,806 147 (195)101,758 — 423 101,335 
Subtotal1,266,165 1,787 (2,912)1,265,040 344,905 299,584 620,551 
Total$1,668,256 $1,787 $(2,912)$1,667,131 $746,996 $299,584 $620,551 
December 31, 2023
Amortized CostGross
Unrealized
Gains		Gross
Unrealized
Losses		Aggregate Fair ValueCash and Cash Equivalents
Short-term
Marketable
Securities (1)
Long-term
Marketable
Securities (2)
Level 1:
Cash$229,676 $— $— $229,676 $229,676 $— $— 
Level 2:
Money market instruments499,483 — — 499,483 499,483 — — 
Corporate debt securities587,896 3,476 (1,996)589,376 — 193,251 396,125 
U.S. government agency securities251,952 556 (1,140)251,368 19,976 111,343 120,049 
Commercial paper20,076 5 — 20,081 5,992 14,089 — 
Asset-backed securities94,744 351 (134)94,961 — — 94,961 
Subtotal1,454,151 4,388 (3,270)1,455,269 525,451 318,683 611,135 
Total$1,683,827 $4,388 $(3,270)$1,684,945 $755,127 $318,683 $611,135 
(1)    The Company’s short-term marketable securities mature in one year or less.
(2)    The Company’s long-term marketable securities mature between one and five years.