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Note 13 - Commitments and Contingencies (Details Textual) - USD ($)
$ in Millions
 3 Months Ended
Jun. 05, 2025
Sep. 30, 2025
EXXUA Exclusive Commercialization Agreement [Member]    
Payments to Acquire Intangible Assets $ 3  
Commercialization Agreement, Period of Payment After Trigger (Day) 45 days  
Commercialization Agreement, Payment Trigger, Period After First Product Launch (Year) 1 year  
Commercialization Agreement, Second Payment $ 3  
Commercialization Agreement, Second Payment, Conditional 5  
Commercialization Agreement, Increase in Second Payment, Condition, Minimum Net Sales For First Year 35  
Commercialization Agreement, Milestone Payments, Threshold Sales $ 100  
Commercialization Agreement, Milestone Payments, Percentage of Sales Exceeding Second Threshold 10.00%  
Commercialization Agreement, Milestone Payments, Second Threshold Sales $ 1,000  
Commercialization Agreement, Royalty Fees, Threshold One, Net Sales 300  
Commercialization Agreement, Royalty Fees, Threshold Two, Net Sales 300  
Commercialization Agreement, Supply Price, Threshold Net Sales $ 300  
Commercialization Agreement, Termination for Breach, Period After Written Notice (Day) 90 days  
Commercialization Agreement, Breach, Period for Curation (Day) 90 days  
Commercialization Agreement, Termination for Difficult Breach, Period After Written Notice (Day) 120 days  
EXXUA Exclusive Commercialization Agreement [Member] | Minimum [Member]    
Commercialization Agreement, Milestone Payment Based on Sales $ 5  
Commercialization Agreement, Royalty Fees, Threshold One, Percentage of Net Sales 28.00%  
Commercialization Agreement, Royalty Fees, Threshold Two, Percentage of Net Sales 24.50%  
Commercialization Agreement, Supply Price, Percentage of Net Sales After Threshold 3.00%  
EXXUA Exclusive Commercialization Agreement [Member] | Maximum [Member]    
Commercialization Agreement, Milestone Payment Based on Sales $ 100  
Commercialization Agreement, Royalty Fees, Threshold One, Percentage of Net Sales 39.00%  
Commercialization Agreement, Royalty Fees, Threshold Two, Percentage of Net Sales 35.50%  
Commercialization Agreement, Supply Price, Percentage of Net Sales After Threshold 4.00%  
Tris Karbinal Agreement [Member]    
Supply and Distribution Commitment, Period (Year)   20 years
Supply and Distribution Commitment, Royalty, Percentage of Net Sales   23.50%