Annual report pursuant to Section 13 and 15(d)

D. ACCOUNTS RECEIVABLE (Details)

v3.8.0.1
D. ACCOUNTS RECEIVABLE (Details) - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Components of accounts receivable    
Accounts receivable $ 1,632,459 $ 1,438,345
Allowance for doubtful accounts (22,173) (34,573)
Accounts receivable, net $ 1,610,286 $ 1,403,772