COMMON STOCK, TRANSACTIONS (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended					3 Months Ended	12 Months Ended
	May 30, 2018	Nov. 30, 2019	Sep. 30, 2018	Jun. 30, 2018	May 31, 2018	Jan. 31, 2018	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Oct. 31, 2019
Common stock disclosures
Warrant Modification								$ 666	$ 765
Proceeds from issuance of common stock and warrants, net of issuance costs								$ 367	16,511
Fair value adjustment of warrants									(12,165)
Warrant reclassified to equity									14,707
Proceeds from exercise of warrants									131
Number of Warrants								270,940
Aggregate number of shares reserved for issuance								282,213
Issuance of common stock to 401(k) plan									6
401(k)
Common stock disclosures
Company contributions to employee 401(k) accounts								$ 55	$ 44
2018 Series A Warrant Exercise price
Common stock disclosures
Exercise price (in dollars per unit)										$ 60.00
Fair value adjustment of warrants		$ 666
2018 Series B Warrant Exercise price
Common stock disclosures
Number of Warrants								0	0
2018 Warrants
Common stock disclosures
Fair value adjustment of warrants			$ 764
Warrant reclassified to equity			$ 14,700
2018 Warrant Exercise price $6.98
Common stock disclosures
Exercise price (in dollars per unit)		$ 6.98						$ 6.98
Number of Warrants								252,896
Placement Agent Warrants
Common stock disclosures
Warrant expiration term (in years)		5 years
Number of shares into which a warrant may be converted		15,168
Exercise price (in dollars per unit)		$ 4.50
Common Stock
Common stock disclosures
Issuance of common stock and warrants in public offerings (in shares)								233,341	55,084
Issuance of common stock to 401(k) plan (in shares)									17
Restricted stock awards issued									6,886
Common Stock | 401(k)
Common stock disclosures
Issuance of common stock to 401(k) plan (in shares)									17
Aggregate number of shares reserved for issuance					137
Number of additional shares reserved					134
Issuance of common stock to 401(k) plan									$ 6
Warrant One
Common stock disclosures
Aggregate number of shares reserved for issuance								270,940
Underwritten Public Offering, June 2018
Common stock disclosures
Proceeds from issuance of common stock and warrants, net of issuance costs				$ 13,500
Reclassification of derivative warrant liability to additional paid-in capital				$ 287
Derivative loss							$ 12,000
Underwritten Public Offering, June 2018 | 2018 Series A Warrant Exercise price
Common stock disclosures
Warrant expiration term (in years)				5 years			5 years
Exercise price (in dollars per unit)								$ 60.00
Proceeds from exercise of warrants								$ 69
Reclassification of derivative warrant liability to additional paid-in capital								10,600
Derivative loss								$ 1,200
Underwritten Public Offering, June 2018 | 2018 Series B Warrant Exercise price
Common stock disclosures
Warrant expiration term (in years)				20 years			20 years
Exercise price (in dollars per unit)								$ 0.30
Proceeds from exercise of warrants								$ 62
Underwritten Public Offering, June 2018 | 2018 Warrants
Common stock disclosures
Proceeds from exercise of warrants								131
Reclassification of derivative warrant liability to additional paid-in capital								10,600
Derivative loss								$ 1,200
Underwritten Public Offering, June 2018 | Common Stock And Warrants
Common stock disclosures
Issuance of common stock and warrants in public offerings (in shares)				45,950
Equity issuance (in price per unit)				$ 60.00			$ 60.00
Pre Funded Units
Common stock disclosures
Issuance of common stock and warrants in public offerings (in shares)				208,096
Equity issuance (in price per unit)				$ 59.70			$ 59.70
Pre Funded Units | 2018 Series A Warrant Exercise price
Common stock disclosures
Number of shares/warrants comprised in a unit (in shares)				1
Pre Funded Units | 2018 Series B Warrant Exercise price
Common stock disclosures
Number of shares/warrants comprised in a unit (in shares)				1
Pre Funded Units | Common Stock
Common stock disclosures
Number of shares of common stock to be purchased by each warrant				1			1
Underwritten public offering during November, 2019.
Common stock disclosures
Proceeds from issuance of common stock and warrants, net of issuance costs		$ 367
Underwritten public offering during November, 2019. | Common Stock And Warrants
Common stock disclosures
Issuance of common stock and warrants in public offerings (in shares)		233,341
Equity issuance (in price per unit)		$ 3.60
Purchase and registration rights agreement | Common Stock
Common stock disclosures
Issuance of common stock and warrants in public offerings (in shares)	574							8,561
Aggregate proceeds could be received						$ 15,000
Term						24 months
Deferred offering costs	$ 627
Proceeds from issuance of common stock, net of issuance costs								$ 3,100
Purchase and registration rights agreement | Common Stock | Maximum
Common stock disclosures
Aggregate number of shares reserved for issuance	40,000