SHORT-TERM INVESTMENTS (Tables)

3 Months Ended

Mar. 31, 2023

SHORT-TERM INVESTMENTS.

Schedule of fair value of available-for-sale investments

	March 31, 2023
	Amortized Cost Basis		Unrealized Gains		Unrealized Losses		Fair Value
Available-for-sale securities:
U.S. treasury bills (due within 1 year)	$	9,904	$	6	$	—	$	9,910
U.S. agency securities (due within 1 year)		207,370		121		—		207,491
Commercial paper (due within 1 year)		728,286		46		(146)		728,186
Corporate notes (due within 1 year)		11,994		3		—		11,997
Total available-for-sale securities	$	957,554	$	176	$	(146)	$	957,584

	December 31, 2022
	Amortized Cost Basis		Unrealized Gains		Unrealized Losses		Fair Value
Available-for-sale securities:
U.S. treasury bills (due within 1 year)	$	63,971	$	—	$	(164)	$	63,807
U.S. agency securities (due within 1 year)		14,733		11		—		14,744
Commercial paper (due within 1 year)		814,772		247		(287)		814,732
Corporate notes (due within 1 year)		11,870		—		(3)		11,867
Total available-for-sale securities	$	905,346	$	258	$	(454)	$	905,150