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SUBSEQUENT EVENT (Details) - USD ($)
 1 Months Ended 3 Months Ended
Apr. 30, 2018
Mar. 31, 2018
Subsequent Event [Line Items]    
Issuance of common stock in connection with at market offering, net of issuance costs (in shares)   776,788
Net cash proceeds from issuance of common stock after deducting sales commissions and offering costs   $ 1,553,000
Other Assets    
Subsequent Event [Line Items]    
Deferred issuance costs   $ 50,000
Subsequent Event    
Subsequent Event [Line Items]    
Issuance of common stock in connection with at market offering, net of issuance costs (in shares) 12,418,318  
Net cash proceeds from issuance of common stock after deducting sales commissions and offering costs $ 46,098,000