WARRANTS, EXCHANGE (Details) $ / shares in Units, $ in Thousands			3 Months Ended			12 Months Ended
	Aug. 10, 2017 USD ($) item $ / shares shares	Aug. 09, 2017 USD ($) $ / shares shares	Mar. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) shares	Mar. 31, 2017 USD ($)	Dec. 31, 2017 shares	Aug. 11, 2017 $ / shares shares
Warrants
Derivatives gain (loss) | $			$ (12)		$ 241
Repurchase of warrants | $			$ 14
Common Stock
Warrants
Issuance of stock in exchange for warrants (in shares)						80,857
Number of shares into which a warrant may be converted				23,102		23,102
Warrant Exchange Agreement | Common Stock
Warrants
Issuance of stock in exchange for warrants (in shares)	80,857
Stock price (in dollars per share) | $ / shares		$ 43.75
Value of stock issued | $	$ 3,537
Warrant Exchange Agreement | Fair Value | Common Stock
Warrants
Issuance of stock in exchange for warrants (in shares)		80,857
Liability | Derivative with Exercise Price Two
Warrants
Exercise price (in dollars per unit) | $ / shares			$ 11.75
Liability | Warrants. | Derivative with Exercise Price Two
Warrants
Repurchase of warrants | $			$ 14	$ 40
Liability | Common Stock | Derivative with Exercise Price Two
Warrants
Number of shares into which a warrant may be converted			307	537		537
Liability | Warrant Exchange Agreement | Derivative with Exercise Price Two
Warrants
Number of times for exchange of warrants | item	3.5
Exercise price (in dollars per unit) | $ / shares	$ 96.75						$ 20.75
Derivatives gain (loss) | $		$ (3,029)
Liability | Warrant Exchange Agreement | Common Stock | Derivative with Exercise Price Two
Warrants
Number of shares into which a warrant may be converted	23,102						1,941