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Note 6 - Debt (Details Textual)
1 Months Ended 2 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
$ / shares
shares
May 14, 2025
USD ($)
$ / shares
shares
May 12, 2025
USD ($)
Jun. 03, 2024
USD ($)
May 14, 2024
USD ($)
Aug. 14, 2025
shares
Aug. 11, 2025
shares
Jun. 30, 2025
USD ($)
$ / shares
shares
Jun. 30, 2025
USD ($)
$ / shares
shares
Jun. 30, 2025
USD ($)
$ / shares
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
$ / shares
Jun. 30, 2024
USD ($)
Jun. 03, 2026
Nov. 01, 2025
USD ($)
Jun. 03, 2025
May 15, 2025
USD ($)
May 13, 2025
USD ($)
Dec. 31, 2024
USD ($)
Gain (Loss) on Extinguishment of Debt                   $ (2,968,000) $ 0 $ (2,968,000) $ 0            
Unrealized Gain (Loss) on Derivatives                   8,207,000 $ 0 8,142,000 0            
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount, Current $ 7,627,000             $ 7,627,000 $ 7,627,000 7,627,000   7,627,000             $ 0
Long-Term Debt, Gross 167,804,000             167,804,000 167,804,000 167,804,000   167,804,000              
Financial Instrument, Mandatorily Redeemable, Liability Classified, Settlement, Amount               3,300,000                      
Payments of Debt Restructuring Costs                       $ (0) $ 21,179,000            
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]       Secured Overnight Financing Rate (SOFR) [Member]                              
Convertible Senior Notes 2026 [Member]                                      
Debt Instrument, Maturity Date   Jun. 15, 2029                   Feb. 15, 2026              
Convertible Debt, Fair Value Disclosures [1] 16,048,000             16,048,000 16,048,000 16,048,000   $ 16,048,000             93,752,000
Debt Issuance Costs, Net $ 100,000             $ 100,000 $ 100,000 $ 100,000   $ 100,000              
Debt Instrument, Interest Rate, Stated Percentage 5.25% 5.25%           5.25% 5.25% 5.25%   5.25%              
Debt Instrument, Interest Rate, Effective Percentage 5.89%             5.89% 5.89% 5.89%   5.89%              
Debt Instrument, Convertible, Conversion Ratio                       54.0906              
Debt Instrument, Convertible Debt, Denominator Amount $ 1,000             $ 1,000 $ 1,000 $ 1,000   $ 1,000              
Debt Instrument, Convertible, Conversion Price | $ / shares $ 18.4875             $ 18.4875 $ 18.4875 $ 18.4875   $ 18.4875              
Debt Instrument, Convertible, Number of Equity Instruments                       1,300,000              
Debt Instrument, Convertible, Threshold Trading Days   20                                  
Long-Term Debt, Gross $ 17,017,000 $ 17,100,000           $ 17,017,000 $ 17,017,000 $ 17,017,000   $ 17,017,000           $ 97,900,000 97,178,000
Principal amount $ 17,077,000     $ 14,900,000       $ 17,077,000 $ 17,077,000 $ 17,077,000   $ 17,077,000             97,862,000
Debt Instrument, Covenant, Minimum Principal Amount Required to Trigger Prepayment   38,500,000                                  
Debt Instrument, Covenant, Mandatory Prepayment   $ 20,000,000                                  
Convertible Senior Notes 2026 [Member] | Minimum [Member]                                      
Debt Instrument, Convertible, Conversion Price | $ / shares   $ 2.5                                  
Convertible Senior Notes 2026 [Member] | Fair Value, Inputs, Level 3 [Member]                                      
Debt Instrument, Convertible, Conversion Price | $ / shares $ 18.49             $ 18.49 $ 18.49 $ 18.49   $ 18.49              
Convertible Senior Notes 2026 [Member] | Debt Conversion After September 30, 2020 [Member]                                      
Debt Instrument, Convertible Debt, Denominator Amount $ 1,000             $ 1,000 $ 1,000 $ 1,000   $ 1,000              
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger                       130.00%              
Debt Instrument, Convertible, Threshold Consecutive Trading Days                       5              
Debt Instrument, Convertible, Threshold Sale Price Of Common Stock Conversion Rate Product Percentage Maximum 98.00%             98.00% 98.00% 98.00%   98.00%              
Convertible Senior Notes 2026 [Member] | Debt Conversion On Or After August 15, 2023 [Member]                                      
Debt Instrument, Convertible, Trading Days Before Maturity                       50 days              
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger                       130.00%              
Debt Instrument, Convertible, Threshold Trading Days                       30              
Debt Instrument, Convertible, Threshold Consecutive Trading Days                       20              
The 2029 Notes [Member]                                      
Debt Instrument, Maturity Date   Jun. 15, 2029                                  
Convertible Debt, Fair Value Disclosures [2] $ 59,263,000             $ 59,263,000 $ 59,263,000 $ 59,263,000   $ 59,263,000              
Debt Instrument, Interest Rate, Stated Percentage   9.50%                                  
Debt Instrument, Interest Rate, Effective Percentage 1.82%             1.82% 1.82% 1.82%   1.82%              
Debt Instrument, Convertible, Conversion Ratio   161.81                                  
Debt Instrument, Convertible Debt, Denominator Amount   $ 1,000                                  
Debt Instrument, Convertible, Conversion Price | $ / shares   $ 6.18                                  
Debt Instrument, Convertible, Number of Equity Instruments   11,500,000                                  
Debt Instrument, Convertible, Period After Conversion Date for Interest Payment   18 months                                  
Embedded Derivative, Fair Value of Embedded Derivative, Net $ (15,020,000)             $ (15,020,000) $ (15,020,000) $ (15,020,000)   $ (15,020,000)              
Debt Instrument, Unamortized Discount   $ 20,200,000                                  
Debt Instrument, Convertible, Trading Days Before Maturity   50 days                                  
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger   130.00%                                  
Debt Instrument, Convertible, Threshold Trading Days   20                                  
Debt Instrument, Convertible, Threshold Consecutive Trading Days   30                                  
Debt Instrument, Default, Declared Payable in Full, Percentage of Holders of Debt   25.00%                                  
Debt Instrument, Default, Special Interest Period   180 days                                  
Long-Term Debt, Gross 63,474,000             63,474,000 63,474,000 63,474,000   63,474,000              
Principal amount 70,785,000             70,785,000 70,785,000 70,785,000   70,785,000              
The 2029 Notes [Member] | Conversion Option Derivative [Member]                                      
Embedded Derivative, Fair Value of Embedded Derivative, Net $ (15,000,000) $ (23,000,000)           (15,000,000) $ (15,000,000) $ (15,000,000)   $ (15,000,000)         $ (23,000,000)    
Unrealized Gain (Loss) on Derivatives               $ 8,000,000                      
The Credit and Guaranty Agreement [Member]                                      
Debt Instrument, Maturity Date       Jun. 03, 2028                              
Debt Instrument, Interest Rate, Stated Percentage 13.17%             13.17% 13.17% 13.17%   13.17%              
Debt Instrument, Interest Rate, Effective Percentage 3.44%             3.44% 3.44% 3.44%   3.44%              
Debt Instrument, Default, Declared Payable in Full, Percentage of Holders of Debt       25.00%                              
Debt Instrument, Floor on Variable Rate       3.00%                              
Debt Instrument, Basis Spread on Variable Rate       8.75%                              
Debt Instrument, Percentage of Interest Payable in Cash       50.00%                              
Debt Instrument, Paid In Kind, Basis Spread on Variable Rate       10.25%                              
Debt Instrument, Prepayment, Percentage of Milestone Payments Received       25.00%                              
Debt Instrument, Prepayment, Percentage of Cash Proceeds From Sale or License of Assets       60.00%                              
Debt Instrument, Prepayment, Percentage of Cash Proceeds From Indebtedness       100.00%                              
Debt Instrument, Prepayment, Percentage of Net Cash Proceeds From Insurance Recoveries       100.00%                              
Debt Instrument, Prepayments, Annual Prepayment Percentage       5.00%                       5.00%      
Debt Instrument, Covenant, Required Unrestricted Cash $ 25,000,000     $ 25,000,000       $ 25,000,000 $ 25,000,000 $ 25,000,000   $ 25,000,000              
Debt Instrument, Covenant, Open Market Transactions, Maximum Amount of Initial Cash       25,000,000                              
Debt Instrument, Covenant, Open Market Transactions, Conditional Additional Amount       10,000,000                              
Debt Instrument, Covenant, Open Market Transactions, Unlimited Threshold       $ 38,500,000                              
Debt Instrument, Covenant, Open Market Transactions, Maximum Additional Amount, Percentage of Proceeds From Equity Offering       50.00%                              
Long-Term Debt, Fair Value 69,900,000             69,900,000 69,900,000 69,900,000   $ 69,900,000             $ 69,500,000
The Credit and Guaranty Agreement [Member] | Forecast [Member]                                      
Debt Instrument, Covenant, Minimum Principal Amount Required to Trigger Prepayment                             $ 38,500,000        
Debt Instrument, Covenant, Mandatory Prepayment                             20,000,000        
Debt Instrument, Covenant, Prepayment Premium                             $ 1,000,000        
Debt Instrument, Prepayments, Annual Prepayment Percentage                           3.00%          
The Credit and Guaranty Agreement [Member] | Initial Term Loan [Member]                                      
Debt Instrument, Face Amount       $ 67,100,000                              
The 2026 Capped Call [Member]                                      
Debt Instrument, Convertible, Number of Equity Instruments                       12,200,000              
Debt Instrument, Convertible, Threshold Trading Days                       50              
Debt Instrument, Convertible, Fair Value Amount of Equity Component $ 23,200,000             $ 23,200,000 $ 23,200,000 $ 23,200,000   $ 23,200,000              
The 2026 Capped Call [Member] | Minimum [Member]                                      
Debt Instrument, Convertible, Conversion Price | $ / shares $ 18.49             $ 18.49 $ 18.49 $ 18.49   $ 18.49              
The 2026 Capped Call [Member] | Maximum [Member]                                      
Debt Instrument, Convertible, Conversion Price | $ / shares $ 26.1             $ 26.1 $ 26.1 $ 26.1   $ 26.1              
Conversion of the 2026 Notes Into 2029 Notes [Member]                                      
Debt Conversion, Original Debt, Net Amount   70,400,000                                  
Convertible Debt, Fair Value Disclosures   73,500,000                                  
Debt Conversion, Original Debt, Amount   70,800,000                                  
Debt Issuance Costs, Net   400,000                                  
Gain (Loss) on Extinguishment of Debt   3,000,000                                  
Conversion of the 2026 Notes Into Common Stock [Member]                                      
Debt Conversion, Original Debt, Amount   $ 10,000,000 $ 10,000,000   $ 10,000,000                            
Debt Instrument, Convertible, Threshold Trading Days   20                                  
Debt Conversion, Converted Instrument, Shares Issued | shares 539,320 10,000,000           539,320 539,320                    
Conversion of the 2026 Notes Into Common Stock [Member] | Subsequent Event [Member]                                      
Debt Conversion, Converted Instrument, Shares Issued | shares           1,996,555 1,996,555                        
Conversion of 2026 Notes Into Common Stock and 2029 Notes [Member]                                      
Debt Conversion, Original Debt, Amount   $ 80,800,000                                  
Conversion of 2026 Notes into New Term Loans [Member]                                      
Debt Conversion, Original Debt, Amount       118,100,000                              
Payments of Debt Restructuring Costs       21,700,000                              
Repayments of Debt       $ 88,800,000                              
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed       75.00%                              
Debt Instrument, Increase (Decrease), Net       $ (51,000,000)                              
Debt Instrument, Unamortized Premium       $ 29,300,000                              
[1] The fair value is classified as Level 2 liability due to the limited trading activity for the 2026 Notes. This balance reflects the fair value of the 2026 Notes based on quoted prices in an over-the counter market using the most recent trading information at the end of the reporting period. The value of the conversion feature of the 2026 Notes is not deemed to be significant as the current market price of our common stock is below the initial conversion price of $18.49 per share of common stock.
[2] The fair value is classified as a Level 2 liability due to the limited trading activity for the 2029 Notes. This balance reflects the fair value of the 2029 Notes based on quoted prices in an over-the counter market using the most recent trading information at the end of the reporting period.