STOCK-BASED COMPENSATION (Details)	9 Months Ended
	Sep. 30, 2016 $ / shares shares
Number of options, outstanding
Outstanding, beginning of period (in shares) | shares	3,131
Granted | shares	786
Exercised | shares	(31)
Cancelled | shares	(68)
Outstanding, end of period (in shares) | shares	3,818
Weighted average exercise price
Outstanding, beginning of period (in dollars per share) | $ / shares	$ 3.38
Granted (in dollars per share) | $ / shares	1.76
Exercised (in dollars per share) | $ / shares	3.81
Cancelled (in dollars per share) | $ / shares	3.35
Outstanding, end of period (in dollars per share) | $ / shares	$ 3.02