Note 6 - Convertible Senior Notes - Schedule of Long-term Debt (Details) (Parentheticals)	Jun. 30, 2023		Mar. 31, 2023
March 2023 Note [Member] | Convertible Senior Notes [Member]
Debt Instrument, Interest Rate, Stated Percentage	3.00%	[1]	3.00%

[1] The carrying amounts presented are net of unamortized debt issuance costs of $10,618 as of June 30, 2023.