DERIVATIVE INSTRUMENTS, CHANGES IN DERIVATIVE WARRANT LIABILITY (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Changes in Derivative Warrant Liability
Balance at beginning of year			$ 1,314
Balance at end of period	$ 41		41
Warrants
Changes in Derivative Warrant Liability
Balance at beginning of year	519	$ 2,359	1,314	$ 1,907
Increase in derivative liability prior to warrant exchange	3,029		3,029
Reduction in derivative liability due to warrant exchange	(3,537)		(3,537)
Increase (decrease) in the fair value of warrants	30	336	(765)	788
Balance at end of period	$ 41	$ 2,695	$ 41	$ 2,695