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Condensed Consolidated Statement of Stockholders' Equity (Unaudited) (Parentheticals) - USD ($)
3 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Common Stock [Member]    
Shares issued, offering cost per share (in dollars per share) $ 5.00 $ 7.25
Additional Paid-in Capital [Member]    
Shares issued, offering cost $ 680,952 $ 1,390,262