Condensed Consolidated Statements of Comprehensive Loss - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
REVENUES	$ 157,000	$ 156,000
OPERATING EXPENSES
Research and development	3,254,000	2,240,000
General and administrative	2,665,000	2,844,000
TOTAL OPERATING EXPENSES	5,919,000	5,084,000
NET OPERATING LOSS	(5,762,000)	(4,928,000)
OTHER INCOME, NET
Interest and investment income	48,000	9,000
Other expense	(2,000)	0
TOTAL OTHER INCOME, NET	46,000	9,000
LOSS BEFORE INCOME TAXES	(5,716,000)	(4,919,000)
Benefit from income taxes	0	(25,000)
NET LOSS	(5,716,000)	(4,894,000)
Foreign currency translation adjustment, net of tax	(21,000)	18,000
COMPREHENSIVE LOSS	$ (5,737,000)	$ (4,876,000)
NET LOSS PER SHARE - BASIC AND DILUTED (in dollars per share)	$ (0.28)	$ (0.37)
Weighted average shares outstanding-basic and diluted (in shares)	20,176,372	13,393,190