WARRANTS (Schedule of Warrant Activity) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Roll forward of warrant activity
Balance at the beginning of the period (in shares)	3,730,255	2,915,559
Warrants Issued (in shares)		3,702,663
Warrant Exercised/Expired (in shares)	(345,155)	(2,887,967)
Balance at the end of the period (in shares)	3,385,100	3,730,255
Bridge Warrants
Roll forward of warrant activity
Balance at the beginning of the period (in shares)	249,999	249,999
Warrant Exercised/Expired (in shares)	(249,999)
Balance at the end of the period (in shares)	0	249,999
Consulting Warrant
Warrant liabilities
Exercise price (in dollars per share)	$ 0.01
Roll forward of warrant activity
Balance at the beginning of the period (in shares)	12,223	98,000
Warrant Exercised/Expired (in shares)	(5,556)	(85,777)
Balance at the end of the period (in shares)	6,667	12,223
Exercise of warrants, cashless (in shares)	242,913	85,620
Financing Warrants
Warrant liabilities
Exercise price (in dollars per share)	$ 3.35
Roll forward of warrant activity
Balance at the beginning of the period (in shares)	62,530	78,186
Warrant Exercised/Expired (in shares)	0	(15,656)
Balance at the end of the period (in shares)	62,530	62,530
Exercise of warrants, cashless (in shares)	5,542	6,842
Financing Warrants | Cashless
Roll forward of warrant activity
Warrant Exercised/Expired (in shares)	(5,556)	(15,656)
Underwriting Warrant
Warrant liabilities
Exercise price (in dollars per share)	$ 7.50
Roll forward of warrant activity
Balance at the beginning of the period (in shares)	310,500	310,500
Warrant Exercised/Expired (in shares)	0
Balance at the end of the period (in shares)	310,500	310,500
IR Consulting Warrants
Roll forward of warrant activity
Balance at the beginning of the period (in shares)	6,000	48,000
Warrant Exercised/Expired (in shares)	(6,000)	(42,000)
Balance at the end of the period (in shares)	0	6,000
Private Placement Warrants - 2016
Warrant liabilities
Exercise price (in dollars per share)	$ 2.86
Roll forward of warrant activity
Balance at the beginning of the period (in shares)	891,063	1,995,124
Warrants Issued (in shares)		0
Warrant Exercised/Expired (in shares)	(73,000)	(1,104,061)
Balance at the end of the period (in shares)	818,063	891,063
Exercise of warrants, cashless (in shares)		49,063
Private Placement Warrants - 2016 | Cashless
Roll forward of warrant activity
Warrant Exercised/Expired (in shares)	(73,000)	(122,281)
Private Placement Warrants - 2016 | Cash
Roll forward of warrant activity
Warrant Exercised/Expired (in shares)		(981,780)
Warrant exercised, subject to inducement (in shares)		836,780
Inducement, fee amount (in dollars per share)		$ 0.29
Underwriting Warrants - Public Offering 2016
Roll forward of warrant activity
Balance at the beginning of the period (in shares)	122,175	135,750
Warrants Issued (in shares)		0
Warrant Exercised/Expired (in shares)		(13,575)
Balance at the end of the period (in shares)		122,175
Private Placement Warrants - February 2017
Roll forward of warrant activity
Balance at the beginning of the period (in shares)	0	0
Warrants Issued (in shares)		1,626,898
Warrant Exercised/Expired (in shares)		(1,626,898)
Balance at the end of the period (in shares)		0
Private Placement Warrants - February 2017 | Cash
Roll forward of warrant activity
Warrant Exercised/Expired (in shares)		(1,626,898)
Inducement, fee amount (in dollars per share)		$ 4.13
Underwriting Warrants - Public Offering 2016
Warrant liabilities
Exercise price (in dollars per share)	$ 4.25
Roll forward of warrant activity
Balance at the beginning of the period (in shares)	122,175
Warrant Exercised/Expired (in shares)		(13,575)
Balance at the end of the period (in shares)	122,175	122,175
Exercise of warrants, cashless (in shares)		6,322
Private Placement Warrants - September 2017
Warrant liabilities
Exercise price (in dollars per share)	$ 4.85
Roll forward of warrant activity
Balance at the beginning of the period (in shares)	1,976,919	0
Warrants Issued (in shares)		1,976,919
Warrant Exercised/Expired (in shares)	(10,600)	0
Balance at the end of the period (in shares)	1,966,319	1,976,919
Placement Agent Warrants - 2017
Warrant liabilities
Exercise price (in dollars per share)	$ 4.85
Roll forward of warrant activity
Balance at the beginning of the period (in shares)	98,846	0
Warrants Issued (in shares)		98,846
Warrant Exercised/Expired (in shares)	0
Balance at the end of the period (in shares)	98,846	98,846