Note 7 - Convertible Senior Notes (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Convertible Debt [Table Text Block]

	As of December 31, 2023
	Carrying Value (1)		Fair Value
3.00% Convertible Senior Notes Maturing April 1, 2028		393,074		581,613

	Twelve Months Ended
	December 31,
Contractual interest expense		9,426
Amortization of issuance costs		1,582
Total		11,008