Quarterly report pursuant to Section 13 or 15(d)

D. ACCOUNTS RECEIVABLE (Details)

v3.19.3
D. ACCOUNTS RECEIVABLE (Details) - USD ($)
Sep. 30, 2019
Dec. 31, 2018
Components of accounts receivable    
Accounts receivable $ 2,102,246 $ 1,146,832
Allowance for doubtful accounts (22,248) (65,541)
Accounts receivable, net $ 2,079,998 $ 1,081,291