Condensed Consolidated Statements of Comprehensive Loss - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
REVENUES	$ 106,000	$ 25,000	$ 482,000	$ 115,000
OPERATING EXPENSES
Research and development	2,336,000	1,599,000	6,956,000	4,299,000
General and administrative	1,978,000	2,407,000	6,939,000	5,866,000
TOTAL OPERATING EXPENSES	4,314,000	4,006,000	13,895,000	10,165,000
NET OPERATING LOSS	(4,208,000)	(3,981,000)	(13,413,000)	(10,050,000)
OTHER INCOME, NET
Interest and investment income	14,000	4,000	39,000	10,000
Other expense	(6,000)	0	(7,000)	0
TOTAL OTHER INCOME, NET	8,000	4,000	32,000	10,000
LOSS BEFORE INCOME TAXES	(4,200,000)	(3,977,000)	(13,381,000)	(10,040,000)
Provision for (benefit from) income taxes	16,000	0	40,000	(1,000)
NET LOSS	(4,184,000)	(3,977,000)	(13,341,000)	(10,041,000)
Foreign currency translation adjustment, net of tax	(17,000)	(1,000)	46,000	(1,000)
COMPREHENSIVE LOSS	$ (4,201,000)	$ (3,978,000)	$ (13,295,000)	$ (10,042,000)
NET LOSS PER SHARE - BASIC AND DILUTED (in dollars per share)	$ (0.28)	$ (0.39)	$ (0.94)	$ (1.14)
Weighted average shares outstanding-basic and diluted (in shares)	14,757,688	10,095,395	14,233,774	8,772,582