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SUBSEQUENT EVENTS (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 9 Months Ended
Nov. 30, 2017
Oct. 31, 2017
Oct. 31, 2016
SUBSEQUENT EVENTS      
Net proceeds from issuance of common stock, preferred stock and warrants   $ 6,355 $ 5,675
Subsequent event      
SUBSEQUENT EVENTS      
Beneficial ownership interest at election of purchaser (as a percentage) 9.99%    
Subsequent event | Minimum      
SUBSEQUENT EVENTS      
Beneficial ownership interest if common stock issued (as a percentage) 4.99%    
Subsequent event | Prefunded warrants      
SUBSEQUENT EVENTS      
Warrants exercise price (in dollars per share) $ 0.001    
Subsequent event | Common Stock      
SUBSEQUENT EVENTS      
Issuance of stock (in shares) 45,275,000    
Subsequent event | Common Stock | Prefunded warrants and series A      
SUBSEQUENT EVENTS      
Number of common shares called by each warrant (in shares) 1    
Subsequent event | Common Stock | Prefunded warrants and series B      
SUBSEQUENT EVENTS      
Number of common shares called by each warrant (in shares) 1    
Subsequent event | Common Stock | Series A and series B      
SUBSEQUENT EVENTS      
Warrants exercise price (in dollars per share) $ 0.15    
Subsequent event | Warrant      
SUBSEQUENT EVENTS      
Net proceeds from issuance of common stock, preferred stock and warrants $ 9,700    
Subsequent event | Warrant | Series A Warrants      
SUBSEQUENT EVENTS      
Number of shares of common stock subject to warrant (in shares) 73,500,000    
Warrants exercise price (in dollars per share) $ 0.20    
Warrants, expiration term 5 years    
Subsequent event | Warrant | Series B Warrants      
SUBSEQUENT EVENTS      
Number of shares of common stock subject to warrant (in shares) 73,500,000    
Warrants exercise price (in dollars per share) $ 0.25    
Warrants exercisable after number of trading days from a press release 21 days    
Warrants exercisable after number of months from issuance 18 months    
Subsequent event | Warrant | Prefunded warrants      
SUBSEQUENT EVENTS      
Number of shares of common stock subject to warrant (in shares) 28,225,000    
Subsequent event | Warrant | Prefunded warrants, series A and series B      
SUBSEQUENT EVENTS      
Warrants exercise price (in dollars per share) $ 0.1490