COMMON STOCK, TRANSACTIONS (Details)	1 Months Ended					12 Months Ended
	Dec. 31, 2020 USD ($) $ / shares shares	Oct. 31, 2020 USD ($) $ / shares shares	Apr. 30, 2020 USD ($) $ / shares shares	Mar. 31, 2020 USD ($) $ / shares shares	Nov. 30, 2019 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) shares	Oct. 31, 2019 $ / shares
Common stock disclosures
Warrant modification expense | $							$ 666,000
Proceeds from issuance of common stock and warrants, net of issuance costs | $						$ 22,119,000	367,000
Proceeds from exercise of warrants | $						$ 343,000
Number of Warrants	24,714,084					24,714,084
Aggregate number of shares reserved for issuance	24,718,353					24,718,353
Series A Warrants
Common stock disclosures
Exercise price (in dollars per unit) | $ / shares				$ 2.75
Number of Warrants				1,589,842
Series B Warrants 2020
Common stock disclosures
Exercise price (in dollars per unit) | $ / shares				$ 0.00001
Intrinsic value | $	$ 4,400,000					$ 4,400,000
Shares issued on exercise of warrants						1,577,114
Number of Warrants				1,589,842
April 2020 Warrants
Common stock disclosures
Fair value of warrants | $			$ 2,100,000
Number of shares into which a warrant may be converted			1,715,240
Exercise price (in dollars per unit) | $ / shares			$ 1.62
Proceeds from exercise of warrants | $	$ 57,000
Shares issued on exercise of warrants	35,000
April 2020 Warrants | Expected volatility
Common stock disclosures
Fair value assumptions			1.1584
April 2020 Warrants | Risk-free interest rate
Common stock disclosures
Fair value assumptions			0.0040
April 2020 Warrants | Contractual term
Common stock disclosures
Warrant expiration term (in years)			5 years 6 months
April 2020 Warrants | Expected dividend yield
Common stock disclosures
Fair value assumptions | $			0
Wainwright 2020 Placement Agent Warrants
Common stock disclosures
Fair value of warrants | $			$ 128,000
Number of shares into which a warrant may be converted			111,491
Exercise price (in dollars per unit) | $ / shares			$ 2.1875
Proceeds from issuance of common stock and warrants, net of issuance costs | $		$ 13,500,000		$ 6,000,000
Percentage of warrants issued as a percentage of the warrants issued to the investors			6.50%
Proceeds from issuance of common stock, net of issuance costs | $			$ 2,600,000
Wainwright 2020 Placement Agent Warrants | Expected volatility
Common stock disclosures
Fair value assumptions			1.1614
Wainwright 2020 Placement Agent Warrants | Risk-free interest rate
Common stock disclosures
Fair value assumptions			0.0036
Wainwright 2020 Placement Agent Warrants | Contractual term
Common stock disclosures
Warrant expiration term (in years)			5 years
Wainwright 2020 Placement Agent Warrants | Expected dividend yield
Common stock disclosures
Fair value assumptions | $			0
March 2020 Series A Warrants
Common stock disclosures
Issuance of common stock and warrants in public offerings (in shares)				955,613
2018 Series A Warrant Exercise price
Common stock disclosures
Exercise price (in dollars per unit) | $ / shares					$ 6.98
Fair value adjustment of warrants | $							$ 700,000
2018 Warrants
Common stock disclosures
Proceeds from exercise of warrants | $						$ 286,000
Shares issued on exercise of warrants							0
2018 Warrant Exercise price $6.98
Common stock disclosures
Exercise price (in dollars per unit) | $ / shares	$ 6.98					$ 6.98		$ 60.00
Number of Warrants	211,921					211,921
Placement Agent Warrants
Common stock disclosures
Fair value of warrants | $				$ 59,000
Number of shares into which a warrant may be converted					15,168
Exercise price (in dollars per unit) | $ / shares	$ 1.00			$ 3.4375	$ 4.50	$ 1.00
Percentage of aggregate number of shares available | $				$ 6.50
Shares issued on exercise of warrants						0
Number of Warrants	1,218,750			165,455		1,218,750
Placement Agent Warrants | Expected volatility
Common stock disclosures
Fair value assumptions				1.0082
Placement Agent Warrants | Risk-free interest rate
Common stock disclosures
Fair value assumptions				0.0161
Placement Agent Warrants | Contractual term
Common stock disclosures
Warrant expiration term (in years)				5 years
Placement Agent Warrants | Expected dividend yield
Common stock disclosures
Fair value assumptions | $				0
Common Stock
Common stock disclosures
Issuance of common stock and warrants in public offerings (in shares)						14,455,853	233,341
Warrant One
Common stock disclosures
Aggregate number of shares reserved for issuance	24,714,084					24,714,084
October 2020 Offering
Common stock disclosures
Issuance of common stock and warrants in public offerings (in shares)		11,785,000
Equity issuance (in price per unit) | $ / shares		$ 0.80
October 2020 Offering | Expected volatility
Common stock disclosures
Fair value assumptions		1.1913
October 2020 Offering | Risk-free interest rate
Common stock disclosures
Fair value assumptions		0.0035
October 2020 Offering | Contractual term
Common stock disclosures
Warrant expiration term (in years)		5 years
October 2020 Offering | Expected dividend yield
Common stock disclosures
Fair value assumptions | $ / shares		0
October 2020 Offering | Series A Prefunded Warrants October 2020
Common stock disclosures
Issuance of common stock and warrants in public offerings (in shares)		6,965,000
Equity issuance (in price per unit) | $ / shares		$ 0.80
Fair value of warrants | $		$ 8,700,000
October 2020 Offering | Series B Prefunded Warrants October 2020
Common stock disclosures
Fair value of warrants | $		$ 5,600,000
Number of shares into which a warrant may be converted		6,965,000
Exercise price (in dollars per unit) | $ / shares		$ 0.00001
October 2020 Offering | Series A Warrants
Common stock disclosures
Number of shares into which a warrant may be converted		11,785,000
Exercise price (in dollars per unit) | $ / shares		$ 0.80
October 2020 Offering | Wainwright 2020 Placement Agent Warrants
Common stock disclosures
Number of shares into which a warrant may be converted		1,218,750
Exercise price (in dollars per unit) | $ / shares		$ 1.00
Percentage of aggregate number of shares available | $		$ 6.50
October 2020 Offering | Placement Agent Warrants
Common stock disclosures
Fair value of warrants | $		$ 551,300
October 2020 Offering | Common Stock And Warrants
Common stock disclosures
Issuance of common stock and warrants in public offerings (in shares)		6,965,000
April 2020 Shares
Common stock disclosures
Issuance of common stock and warrants in public offerings (in shares)			1,715,240
Equity issuance (in price per unit) | $ / shares			$ 1.75
Underwritten Public Offering March 2020 [Member]
Common stock disclosures
Issuance of common stock and warrants in public offerings (in shares)				955,613
Equity issuance (in price per unit) | $ / shares				$ 2.75
Underwritten Public Offering March 2020 [Member] | Expected volatility
Common stock disclosures
Fair value assumptions				1.1522
Underwritten Public Offering March 2020 [Member] | Risk-free interest rate
Common stock disclosures
Fair value assumptions				0.0063
Underwritten Public Offering March 2020 [Member] | Contractual term
Common stock disclosures
Warrant expiration term (in years)				5 years
Underwritten Public Offering March 2020 [Member] | Expected dividend yield
Common stock disclosures
Fair value assumptions | $ / shares				0
Underwritten Public Offering March 2020 [Member] | Series A Warrants
Common stock disclosures
Fair value of warrants | $				$ 3,500,000
Underwritten Public Offering March 2020 [Member] | Placement Agent Warrants
Common stock disclosures
Fair value of warrants | $				$ 218,000
Underwritten public offering during November, 2019.
Common stock disclosures
Issuance of common stock and warrants in public offerings (in shares)					233,341
Equity issuance (in price per unit) | $ / shares					$ 3.60
Proceeds from issuance of common stock and warrants, net of issuance costs | $					$ 367,000