SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - Allowance for doubtful accounts - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Allowance for doubtful accounts [Abstract]
Balance at beginning of year	$ 43,200	$ 160,000
Additions charged to costs and expenses	226,479	63,227
Accounts written off	(186,679)	(180,027)
Balance at end of year	$ 83,000	$ 43,200