4. ACCOUNTS RECEIVABLE (Details) - Schedule of accounts receivable - USD ($)	Jun. 30, 2016	Dec. 31, 2015
Schedule of accounts receivable [Abstract]
Accounts receivable from customers	$ 1,587,578	$ 1,706,948
Allowance for doubtful accounts	(55,043)	(56,364)
Accounts receivable, net	$ 1,532,535	$ 1,650,584