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Note 7 - Stockholders' Equity (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended
Aug. 22, 2025
Sep. 30, 2025
Jun. 30, 2025
The FY26 PSUs [Member] | Eligible Employees [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)   44,000  
The FY26 PSUs [Member] | Eligible Employees [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award Number of Shares Issued Upon Vesting, Percentage   0.00%  
The FY26 PSUs [Member] | Eligible Employees [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award Number of Shares Issued Upon Vesting, Percentage   200.00%  
Stock Option Units [Member] | Eligible Employees [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)   134,000  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price (in dollars per share)   $ 191.02  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value   $ 0  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term (Year)   2 years 6 months  
The 2021 Equity Plan [Member]      
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) 1,156   660,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares) 496