v3.25.2
Note 9 - Common Stock Incentive, Stock Purchase Plans, and Other Compensation Plans (Tables)
12 Months Ended
Jun. 30, 2025
Notes Tables  
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
      

Weighted

 
   Shares  Average 
     

Exercise Price

 

Outstanding at June 30, 2023

  38,166  $27.34 

Granted

  131,840   10.01 

Exercised

  -   - 

Canceled or expired

  (13,378)  10.70 

Outstanding at June 30, 2024

  156,628  $14.18 

Granted

  102,260   9.43 

Exercised

  -   - 

Canceled or expired

  (45,775)  12.10 

Outstanding at June 30, 2025

  213,113  $12.35 
Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]
      

Options

             
      

Outstanding

          

Options

 
      

Weighted-

          

Exercisable

 
      

Average

  

Weighted-

      

Weighted-

 
  

Number

  

Remaining

  

Average

  

Number

  

Average

 
  Outstanding  Contractual  Exercise  Exercisable  Exercise 

Range of exercise prices

    Life (years)  Price     Price 

$5.50 – $9.69

  55,000   9.45  $7.41   2,551  $9.21 

$10.10 – $11.27

  79,770   8.24   10.12   27,720   10.14 
$11.51 – $19.20  76,402   8.22   14.21   29,422   18.42 
$159.00 – $175.50  1,941   1.86   170.33   1,941   170.33 

$5.50 – $175.50

  213,113   8.49  $12.35   61,634  $19.10 
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
      

Weighted

 
      

Average

 
  

Shares

  

Grant-Date

 
      

Fair Value

 

Outstanding at June 30, 2023

  50,671  $33.43 

Granted

  20,000   10.10 

Vested

  (26,898)  45.50 

Canceled or expired

  -   - 

Outstanding at June 30, 2024

  43,773  $15.36 

Granted

  65,000   5.90 

Vested

  (15,163)  14.85 

Canceled or expired

  (7,776)  10.97 

Outstanding at June 30, 2025

  85,834  $14.11 
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
  

Year Ended

  

Year Ended

 

(in thousands)

 

June 30, 2025

  

June 30, 2024

 

Selling, Administration and General

 $665  $1,364 

Research & Development

  165   114 

Total

  $830   $1,478 
Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]
  

Year Ended

  

Year Ended

 
  

June 30, 2025

  

June 30, 2024

 

Expected Dividend Yield

  -   - 

Expected Volatility

  100.06%  99.85%

Risk-Free Interest Rates

  4.24%  4.36%

Expected Option Life (in years)

  3.5   3.5 

Weighted-average grant-date fair value of options awarded

 $15.80  $11.63