Annual report pursuant to Section 13 and 15(d)

Consolidated Balance Sheets (Parenthetical)

v3.21.1
Consolidated Balance Sheets (Parenthetical) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Consolidated Balance Sheets [Abstract]    
Accounts receivable, allowance for doubtful accounts $ 33,848 $ 88,071
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares issued 55,410,695 51,380,969
Common stock, shares outstanding 55,410,695 51,380,969