Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
REVENUES	$ 124,000	$ 220,000	$ 281,000	$ 376,000
OPERATING EXPENSES
Research and development	3,347,000	2,380,000	6,601,000	4,620,000
General and administrative	2,833,000	2,117,000	5,498,000	4,961,000
TOTAL OPERATING EXPENSES	6,180,000	4,497,000	12,099,000	9,581,000
NET OPERATING LOSS	(6,056,000)	(4,277,000)	(11,818,000)	(9,205,000)
OTHER INCOME, NET
Interest and investment income	98,000	16,000	146,000	25,000
Other expense	(2,000)	(1,000)	(4,000)	(1,000)
TOTAL OTHER INCOME, NET	96,000	15,000	142,000	24,000
LOSS BEFORE INCOME TAXES	(5,960,000)	(4,262,000)	(11,676,000)	(9,181,000)
Provision for (benefit from) income taxes	(8,000)	1,000	(8,000)	(24,000)
NET LOSS	(5,952,000)	(4,263,000)	(11,668,000)	(9,157,000)
Foreign currency translation adjustment, net of tax	(36,000)	45,000	(15,000)	63,000
COMPREHENSIVE LOSS	$ (5,988,000)	$ (4,218,000)	$ (11,683,000)	$ (9,094,000)
NET LOSS PER SHARE - BASIC AND DILUTED (in dollars per share)	$ (0.22)	$ (0.29)	$ (0.50)	$ (0.66)
Weighted average shares outstanding-basic and diluted (in shares)	26,679,503	14,535,451	23,445,902	13,967,476