STOCKHOLDERS' EQUITY (Details Narrative) - USD ($)									12 Months Ended
	Jan. 12, 2016	Jan. 06, 2016	Jul. 15, 2015	Jul. 09, 2015	Feb. 17, 2015	Feb. 10, 2015	Aug. 04, 2014	Jul. 29, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Preferred stock, par value (in dollars per share)									$ 0.001	$ 0.001
Preferred stock, shares authorized									10,000,000	10,000,000
Preferred stock, shares issued									0	0
Preferred stock, shares outstanding									0	0
Common stock, shares authorized									350,000,000	350,000,000
Common stock, shares issued									196,688,222	177,928,041
Common stock, shares outstanding									196,688,222	177,928,041
Common stock issued during the period									$ 134,863,475	$ 91,374,649	$ 42,771,353
Value of common stock issued during period for stock options exercised									989,060	1,232,579	345,746
Shares issued for exercise of warrants, net									$ 1,373,000	366,000	181,000
Stock Options [Member]
Value of common stock issued during period for stock options exercised										$ 1,232,579	$ 345,746
Number of common stock issued during period for stock options exercised (shares)									652,471	612,867	724,193
Number of stock options exercised (shares)										417	860,800
Number of stock options exercised in cashless exercise											136,307
Number of common stock issued during period for stock options exercised in cashless exercise (shares)										114	130,380
Individuals [Member]
Value of common stock issued during period for stock options exercised									$ 989,060
Number of common stock issued during period for stock options exercised (shares)									525,362
Number of stock options exercised (shares)									127,109
Number of common stock issued during period for stock options exercised in cashless exercise (shares)									87,833
Goldman Sachs Underwriters [Member]
Number of shares issued during the period							9,850,106	8,565,310
Share price (in dollars per share)								$ 4.67
Common stock issued during the period								$ 42,800,000
Additional common stock issued under offering								1,284,796
Number of days of the option to purchase shares								30 days
Goldman Sachs Underwriters [Member]
Number of shares issued during the period	17,424,242	15,151,515
Share price (in dollars per share)		$ 8.25
Common stock issued during the period		$ 134,900,000
Additional common stock issued under offering		2,272,727
Number of days of the option to purchase shares		30 days
Stifel Underwriters [Member]
Number of shares issued during the period			4,423,077	3,846,154
Share price (in dollars per share)				$ 7.80
Common stock issued during the period				$ 32,200,000
Additional common stock issued under offering				576,923
Number of days of the option to purchase shares				30 days
Cowen and Company, LLC (Underwriters) [Member]
Number of shares issued during the period					15,617,282	13,580,246
Share price (in dollars per share)						$ 4.05
Common stock issued during the period						$ 59,100,000
Additional common stock issued under offering						2,037,036
Number of days of the option to purchase shares						30 days