DERIVATIVE INSTRUMENTS, CHANGES IN DERIVATIVE WARRANT LIABILITY (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Changes in Derivative Warrant Liability
Balance at beginning of year	$ 1,073,000	$ 2,954,000	$ 1,314,000	$ 1,907,000
Increase (decrease) in the fair value of warrants	(554,000)	(595,000)	(795,000)	452,000
Balance at end of period	$ 519,000	$ 2,359,000	$ 519,000	$ 2,359,000