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Note 12 - Fair Value Measurements (Tables)
12 Months Ended
Jun. 30, 2025
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
  

Fair Value at

  

Fair Value Measurements at June 30, 2025

 
  

June 30, 2025

  

(Level 1)

  

(Level 2)

  

(Level 3)

 
  

(in thousands)

 

Liabilities:

            

Derivative warrant liabilities

 $26,334  $  $  $26,334 

Total

 $26,334  $  $  $26,334 
  

Fair Value at

  

Fair Value Measurements at June 30, 2024

 
  

June 30, 2024

  

(Level 1)

  

(Level 2)

  

(Level 3)

 
  

(in thousands)

 

Liabilities:

            

Derivative warrant liabilities

 $12,745  $  $  $12,745 

Total

 $12,745  $  $  $12,745 
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
  

Derivative

 
  

Warrant Liabilities

 
  

(in thousands)

 

Balance as of June 30, 2023

 $6,403 

Issued (1)

  5,148 

Settlements (1)

  (2,810)

Included in earnings

  4,004 

Balance as of June 30, 2024

  12,745 

Issued (2)

  12,349 

Settlements (3)

  (463)

Included in earnings

  1,703 

Balance as of June 30, 2025

 $26,334 
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
  

June 2023 Tranche A Warrants

  

Warrants Other (1)

 
  

Monte Carlo & Black-Scholes

  

Black-Scholes

 

Aytu closing stock price

 $2.18  $2.18 

Equivalent term (years)

  2.9   1.6 - 2.2 

Expected volatility

  85.8%  75.4% - 78.1% 

Risk-free rate

  3.7%  3.7%

Dividend yield

  0%  0%