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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Statement of Financial Position [Abstract]    
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 25,000,000 25,000,000
Common stock, shares issued 2,823,072 2,810,865
Common stock, shares outstanding 2,823,072 2,810,865
Allowance for doubtful accounts $ 63,893 $ 65,927