SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Numerator for basic and diluted loss per share:
Net loss	$ (2,705)	$ (2,431)	$ (2,114)	$ (2,277)	$ (2,579)	$ (1,858)	$ (1,767)	$ (2,330)	$ (1,948)	$ (2,228)	$ (2,074)	$ (1,690)	$ (9,527)	$ (8,534)	$ (7,940)
Preferred dividends													(1,347)	(1,065)	(51)
Net loss available to common shareholders													$ (10,874)	$ (9,599)	$ (7,991)
Denominator for basic loss per share weighted-average shares outstanding	94,779,243	94,550,721	94,298,567	94,073,367	94,070,895	93,876,339	93,674,349	93,515,640	93,384,834	93,162,548	91,930,400	88,604,221	94,426,783	93,786,079	91,795,971
Effect of dilutive securities
Denominator for diluted loss per share weighted-average shares outstanding													94,426,783	93,786,079	91,795,971
Basic and diluted loss per share:
Net loss													$ (0.10)	$ (0.09)	$ (0.09)
Preferred dividends													(0.02)	(0.01)
Net loss available to common shareholders													$ (0.12)	$ (0.10)	$ (0.09)