Note 7 - Debt (Details Textual)				3 Months Ended		6 Months Ended		48 Months Ended
	Apr. 01, 2025 USD ($) shares	Jul. 17, 2024 USD ($)	Jan. 09, 2024 USD ($) $ / shares	Jun. 30, 2025 USD ($)	Mar. 31, 2023 USD ($)	Jun. 30, 2025 USD ($) TradingDays	Jun. 30, 2024 USD ($)	Dec. 31, 2016 USD ($)	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Jan. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Feb. 28, 2019 USD ($)	Jan. 31, 2013 USD ($)
Line of Credit Facility [Line Items]
Debt Instrument, Face Amount														$ 175,000,000
Debt Instrument, Interest Rate, Stated Percentage														3.00%
Proceeds from Convertible Debt						$ 0	$ 230,000,000
Stock Repurchased During Period, Value			$ 50,000,000	$ 18,255,000		18,255,000	50,000,000
Shares Acquired, Average Cost Per Share (in dollars per share) | $ / shares			$ 0.9067
Debt Instrument, Repurchase Amount													$ 28,800,000
Induced Conversion of Convertible Debt Expense						$ 32,647,000	$ 757,000
Debt Instrument, Redemption Price, Percentage						100.00%
Debt Conversion, Converted Instrument, Amount								$ 143,200,000
Repayments of Debt					$ 3,000,000
Long-Term Debt				$ 343,275,000		$ 343,275,000				$ 437,203,000		$ 50,600
Line of Credit [Member]
Line of Credit Facility [Line Items]
Debt, Weighted Average Interest Rate				5.50%		5.50%				5.50%
Minimum [Member]
Line of Credit Facility [Line Items]
Long-Term Debt, Percentage Bearing Variable Interest, Percentage Rate				0.70%		0.70%
Maximum [Member]
Line of Credit Facility [Line Items]
Long-Term Debt, Percentage Bearing Variable Interest, Percentage Rate				4.50%		4.50%
Affiliate Purchasers [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			5.00%
Debt Instrument, Repurchase Amount			$ 55,000,000
Interest Payable			16,100,000
Note Exchange Transactions [Member]
Line of Credit Facility [Line Items]
Proceeds from Convertible Debt	$ 63,500,000
Debt Conversion, Original Debt, Amount	$ 159,200,000
Debt Conversion, Converted Instrument, Shares Issued (in shares) | shares	121,437,998
Gain (Loss) on Extinguishment of Debt	$ 59,100,000
Induced Conversion of Convertible Debt Expense	32,600,000
Debt Instrument, Unamortized Discount, Total	54,700,000
Debt Issuance Costs, Net, Total	$ 4,400,000
The 2044 Notes [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Face Amount		$ 250,000,000
Debt Instrument, Basis Spread on Variable Rate		7.50%
Debt Instrument, Repayment Fee, Percent		3.00%
Debt Instrument, Early Extinguishment, Percent of Principal Amount		150.00%
Debt Instrument, Repayment Fee, Royalty Percentage		80.00%
Debt Instrument, Additional Authorized Amount		$ 50,000,000,000,000
The 2044 Notes [Member] | Debt Principal Amount After July 17, 2029 [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Early Extinguishment, Percent of Principal Amount		200.00%
The 2044 Notes [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate		4.00%
The 2029 Convertible Notes 1 [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Face Amount			$ 230,000,000
Debt Instrument, Interest Rate, Stated Percentage			3.75%
Proceeds from Convertible Debt			$ 222,000,000
Embedded Derivative, Fair Value of Embedded Derivative Liability			125,600,000
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net			$ 26,250,000
Debt Instrument, Convertible, Conversion Ratio			869.5652
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares			$ 1.15
The 2029 Convertible Notes 1 [Member] | Scenario, Event of Default [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Redemption Price, Percentage			100.00%
Debt Instrument, Ownership Interest			25.00%
The 2029 Convertible Notes 1 [Member] | Debt Instrument, Redemption, Period One [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Convertible, Threshold Trading Days | TradingDays						20
Debt Instrument, Convertible, Threshold Consecutive Trading Days | TradingDays						30
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger						130.00%
The 2029 Convertible Notes 1 [Member] | Debt Instrument, Redemption, Period Two [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Convertible, Threshold Trading Days | TradingDays						5
Debt Instrument, Convertible, Threshold Consecutive Trading Days | TradingDays						10
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger						98.00%
The 2029 Convertible Affiliate Notes [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Face Amount			$ 71,100,000
Debt Instrument, Interest Rate, Stated Percentage			3.75%
The 2023 Convertible Notes [Member]
Line of Credit Facility [Line Items]
Interest Payable											$ 16,100,000
The 2023 Convertible Notes [Member] | Convertible Debt [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Face Amount											$ 55,000,000
The 2025 Notes [Member] | Convertible Debt [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Face Amount									$ 170,000
The 2025 Notes [Member] | Convertible Debt [Member] | Scenario, Event of Default [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Face Amount													$ 200,000,000
Debt Instrument, Interest Rate, Stated Percentage													4.50%
The 2033 Senior Notes [Member]
Line of Credit Facility [Line Items]
Long-Term Debt				$ 50,000		$ 50,000				$ 50,000
Notes and Other Debt [Member]
Line of Credit Facility [Line Items]
Debt, Weighted Average Interest Rate				1.80%		1.80%				1.80%