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Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parentheticals) - USD ($)
3 Months Ended
Mar. 31, 2021
Jun. 30, 2020
Statement of Stockholders' Equity [Abstract]    
Issuance of common stock in private placement offering, net of costs $ 1,549,602  
Issuance of common stock in registered direct offering, net of costs $ 5,520,160 $ 622,900