WARRANTS, UNDERWRITTEN PUBLIC OFFERING JUNE 2018 (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Warrants to purchase common stock issued and outstanding
Common stock, par value (in dollars per share)		$ 0.00001	$ 0.00001
Proceeds from issuance of common stock and warrants, net of issuance costs		$ 16,511
2018 Series A Warrant Exercise price $2.00
Warrants to purchase common stock issued and outstanding
Exercise price (in dollars per unit)		$ 2.00
Common Stock
Warrants to purchase common stock issued and outstanding
Number of shares issued (in shares)		1,652,396
Underwritten Public Offering, June 2018
Warrants to purchase common stock issued and outstanding
Proceeds from issuance of common stock and warrants, net of issuance costs	$ 13,500
Underwritten Public Offering, June 2018 | 2018 Series A Warrant Exercise price $2.00
Warrants to purchase common stock issued and outstanding
Number of shares/warrants comprised in a unit (in shares)	1
Exercise price (in dollars per unit)	$ 2.00	$ 2.00
Warrant expiration term (in years)	5 years
Underwritten Public Offering, June 2018 | 2018 Series B Warrant Exercise price $.01
Warrants to purchase common stock issued and outstanding
Exercise price (in dollars per unit)	$ 0.01	$ 0.01
Warrant expiration term (in years)	20 years
Underwritten Public Offering, June 2018 | Common Stock
Warrants to purchase common stock issued and outstanding
Number of shares/warrants comprised in a unit (in shares)	1
Common stock, par value (in dollars per share)	$ 0.00001
Number of shares of common stock to be purchased by each warrant	1
Underwritten Public Offering, June 2018 | Common Stock And Warrants
Warrants to purchase common stock issued and outstanding
Number of shares issued (in shares)	1,378,400
Equity issuance (in price per unit)	$ 2.00
Pre Funded Units
Warrants to purchase common stock issued and outstanding
Number of shares issued (in shares)	6,242,811
Equity issuance (in price per unit)	$ 1.99
Pre Funded Units | 2018 Series A Warrant Exercise price $2.00
Warrants to purchase common stock issued and outstanding
Number of shares/warrants comprised in a unit (in shares)	1
Pre Funded Units | 2018 Series B Warrant Exercise price $.01
Warrants to purchase common stock issued and outstanding
Number of shares/warrants comprised in a unit (in shares)	1
Pre Funded Units | Common Stock
Warrants to purchase common stock issued and outstanding
Number of shares of common stock to be purchased by each warrant	1