SUBSEQUENT EVENTS (Details) - USD ($) $ in Thousands	1 Months Ended			6 Months Ended	12 Months Ended
	Aug. 07, 2018	Jul. 31, 2018	Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Subsequent events
Proceeds from exercise of warrants				$ 10
Underwritten Public Offering, June 2018
Subsequent events
Reclassification of derivative warrant liability to additional paid-in capital			$ 286
Common Stock
Subsequent events
Proceeds from exercise of warrants					$ 3
Subsequent event | Underwritten Public Offering, June 2018
Subsequent events
Proceeds from exercise of warrants	$ 37,000
Reclassification of derivative warrant liability to additional paid-in capital	$ 7,400
Subsequent event | Settlement agreement with former vendor
Subsequent events
Settlement amount		$ 1,200
Proceeds received from settlement agreement		800
Receivable from settlement agreement		$ 400
Subsequent event | Common Stock | Underwritten Public Offering, June 2018
Subsequent events
Number of shares issued (in shares)	3,685,753