Marketable Securities (Details 3) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Debt securities, available-for-sale
Less than 12 months, fair value	$ 59,550	$ 74,431
Less than 12 months, gross unrealized losses	(50)	(58)
12 months or greater, fair value	102,177	112,147
12 months or greater, gross unrealized losses	(2,363)	(3,566)
Fair value	161,727	186,578
Gross unrealized losses	(2,413)	(3,624)
U.S. Government bonds and notes
Debt securities, available-for-sale
Less than 12 months, fair value	30,240	28,893
Less than 12 months, gross unrealized losses	(26)	(23)
12 months or greater, fair value	52,211	62,588
12 months or greater, gross unrealized losses	(1,209)	(1,857)
Corporate notes, bonds and commercial paper
Debt securities, available-for-sale
Less than 12 months, fair value	29,310	45,538
Less than 12 months, gross unrealized losses	(24)	(35)
12 months or greater, fair value	49,966	49,559
12 months or greater, gross unrealized losses	$ (1,154)	$ (1,709)