ORGANIZATION AND DESCRIPTION OF BUSINESS (Liquidity and Capital Resources) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accumulated deficit	$ 99,701,000	$ 92,564,000
Cash, cash equivalents, and investments	15,200,000
Substantial doubt about going concern, management's evaluation, cash used in the period	(6,500,000)
Shelf registration statement maximum aggregate proceeds	$ 50,000,000.0
New shares issued (in shares)	0