Annual report pursuant to Section 13 and 15(d)

D. ACCOUNTS RECEIVABLE (Tables)

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D. ACCOUNTS RECEIVABLE (Tables)
12 Months Ended
Dec. 31, 2019
Receivables [Abstract]  
Schedule of accounts receivable

Components of accounts receivable as of December 31, 2019 and 2018 are as follows:

 

    2019     2018  
Accounts receivable   $ 2,338,626     $ 1,146,832  
Allowance for doubtful accounts     (55,039 )     (65,541 )
Accounts receivable, net   $ 2,283,587     $ 1,081,291