Note 6 - Convertible Senior Notes (Tables)

3 Months Ended

Mar. 31, 2024

Notes Tables

Convertible Debt [Table Text Block]

	As of March 31, 2024
	Carrying Value (1)		Fair Value
3.00% Convertible Senior Notes Maturing April 1, 2028		393,588		707,926
Total		393,588		707,926

Schedule of Long-Term Debt Instruments [Table Text Block]

	Three Months Ended
	March 31, 2024
Contractual interest expense		3,019
Amortization of issuance costs		514
Total		3,533