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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares
Sep. 30, 2025
Mar. 31, 2025
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, authorized (in shares) 10,000,000 10,000,000
Preferred stock, issued (in shares) 7,947 14,002
Preferred stock, outstanding (in shares) 7,947 14,002
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, authorized (in shares) 500,000,000 500,000,000
Common stock, issued (in shares) 11,467,091 9,672,451
Common stock, outstanding (in shares) 11,467,091 9,672,451