STOCKHOLDERS' EQUITY (Details Narrative) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Preferred stock, par value (in dollars per share)			$ 0.001		$ 0.001
Preferred stock, authorized			10,000,000		10,000,000
Common stock, authorized			350,000,000		350,000,000
Common stock, issued			241,221,840		240,462,439
Value of common stock issued during period for stock options exercised	$ 1,084,939	$ 44,056	$ 100,107
Number of stock options exercised (in shares)			276,383
Number of stock options exercised in cashless exercise (in shares)			12,097	10,000
Number of common stock issued during period for stock options exercised in cashless exercise (in shares)			11,834	9,841
Stock Options [Member]
Value of common stock issued during period for stock options exercised	$ 1,084,939		$ 1,128,996
Number of stock options exercised (in shares)	249,785		394,576