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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares
Sep. 30, 2023
Mar. 31, 2023
Temporary equity, par value (in dollars per share) $ 0.001 $ 0.001
Temporary equity, authorized (in shares) 10,000,000 10,000,000
Temporary equity, issued (in shares) 5,000 5,000
Temporary equity, outstanding (in shares) 5,000 5,000
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) 17,230 16,177
Preferred stock, outstanding (in shares) 17,230 16,177
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) 90,906,798 89,632,161
Common stock, outstanding (in shares) 90,906,798 89,632,161