Note 6 - Debt (Tables)

3 Months Ended

Mar. 31, 2026

Notes Tables

Schedule of Debt [Table Text Block]

			March 31,				December 31,
			2026				2025
			(In thousands)

2029 Notes, net maturing on June 15, 2029	Long-term		$	52,810			$	51,364

2026 Notes, net matured on February 13, 2026	Short-term			—				17,063

			$	52,810			$	68,427

2029 Notes embedded derivative reported at fair value			$	84,025			$	157,171

Convertible Debt [Table Text Block]

		March 31,				December 31,
		2026				2025
		(In thousands)
Principal amount		$	70,785			$	70,785
Unamortized debt discount, net of issuance costs			(17,975	)			(19,421	)
Total 2029 Notes		$	52,810			$	51,364

Fair value of outstanding 2029 Notes ⁽¹⁾		$	151,480			$	111,992

Fair value of 2029 Notes embedded derivative ⁽²⁾		$	84,025			$	157,171

		March 31,				December 31,
		2026				2025
		(In thousands)
Principal amount		$	—			$	17,077
Unamortized debt issuance costs			—				(14	)
Total 2026 Notes		$	—			$	17,063

Fair value of outstanding 2026 Notes ⁽¹⁾		$	—			$	16,996

Schedule Of Debt Instrument, Interest Expense Recognized [Table Text Block]

		Three Months Ended
		March 31,
		2026
		(In thousands)
Contractual interest expense		$	1,681
Amortization of debt discount and issuance costs			1,445
Total interest expense		$	3,126

		Three Months Ended
		March 31,
		2026				2025
		(In thousands)
Contractual interest expense		$	—			$	2,233
Amortization of debt premium and issuance costs			—				(1,908	)
Total interest expense		$	—			$	325

		Three Months Ended
		March 31,
		2026				2025
		(In thousands)
Contractual interest expense		$	112			$	1,284
Amortization of debt discount and issuance costs			14				148
Total interest expense		$	126			$	1,432