COMMON STOCK, TRANSACTIONS (Details)	1 Months Ended			3 Months Ended		6 Months Ended
	Oct. 31, 2020 USD ($) $ / shares shares	Apr. 30, 2020 USD ($) $ / shares shares	Mar. 31, 2020 USD ($) $ / shares shares	Jun. 30, 2021 USD ($) Y $ / shares shares	Jun. 30, 2020 USD ($) shares	Jun. 30, 2021 USD ($) Y $ / shares shares	Jun. 30, 2020 USD ($) shares	Dec. 31, 2020 $ / shares	Feb. 11, 2020 $ / shares
Common stock disclosure
Common stock, par value (in dollars per share) | $ / shares				$ 0.00001		$ 0.00001		$ 0.00001	$ 0.00001
Proceeds from issuance of common stock and warrants, net of commissions and issuance costs | $							$ 8,592,000
Proceeds from exercise of warrants | $						$ 8,509,000	$ 343,000
Number of Warrants | shares				14,078,338		14,078,338
April 2020 Shares [Member]
Common stock disclosure
Number of shares issued (in shares) | shares		1,715,240
Equity issuance (in price per unit) | $ / shares		$ 1.75
Proceeds from issuance of common stock | $		$ 2,600,000
Expected volatility
Common stock disclosure
Fair value assumptions | $				115.22		115.22
Risk-free interest rate
Common stock disclosure
Fair value assumptions | $				0.63		0.63
Contractual term
Common stock disclosure
Fair value assumptions | Y				5		5
Expected dividend yield
Common stock disclosure
Fair value assumptions | $				0		0
April 2020 Warrants
Common stock disclosure
Number of shares issued (in shares) | shares					35,000		35,000
Number of warrants to purchase aggregate number of shares | shares		1,715,240
Exercise price (in dollars per unit) | $ / shares		$ 1.62
Fair value of warrants | $		$ 2,100,000
Shares issued on exercise of warrants | shares				0		0
Proceeds from issuance of common stock | $					$ 57,000		$ 57,000
April 2020 Warrants | Expected volatility
Common stock disclosure
Fair value assumptions | $		115.84
April 2020 Warrants | Risk-free interest rate
Common stock disclosure
Fair value assumptions | $		0.40
April 2020 Warrants | Contractual term
Common stock disclosure
Warrant expiration term (in years)		5 years 6 months
April 2020 Warrants | Expected dividend yield
Common stock disclosure
Fair value assumptions | $		0
2018 Warrants {Member]
Common stock disclosure
Exercise price (in dollars per unit) | $ / shares				$ 6.98		$ 6.98
Proceeds from exercise of warrants | $							$ 286,000
Warrants Exercised | $				$ 0		$ 0
Number of Warrants | shares				211,921		211,921
Shares issued on exercise of warrants | shares							40,975
Series B Warrants 2020 [Member]
Common stock disclosure
Number of shares issued (in shares) | shares				0	560,577	0	1,577,114
Exercise price (in dollars per unit) | $ / shares			$ 0.00001
Intrinsic value | $				$ 4,400,000		$ 4,400,000
Number of Warrants | shares			1,589,842
Shares issued on exercise of warrants | shares					0		0
Series A Warrants [Member]
Common stock disclosure
Number of shares issued (in shares) | shares				0		0
Exercise price (in dollars per unit) | $ / shares			$ 2.75
Fair value of warrants | $				$ 3,500,000		$ 3,500,000
Number of Warrants | shares			1,589,842
Shares issued on exercise of warrants | shares					0		0
Wainwright 2020 Placement Agent Warrants [Member]
Common stock disclosure
Number of warrants to purchase aggregate number of shares | shares		111,491
Exercise price (in dollars per unit) | $ / shares		$ 2.1875
Proceeds from issuance of common stock and warrants, net of commissions and issuance costs | $	$ 13,500,000
Fair value of warrants | $		$ 128,000		$ 218,000		$ 218,000
Wainwright 2020 Placement Agent Warrants [Member] | Expected volatility
Common stock disclosure
Fair value assumptions | $		116.14
Wainwright 2020 Placement Agent Warrants [Member] | Risk-free interest rate
Common stock disclosure
Fair value assumptions | $		0.36
Wainwright 2020 Placement Agent Warrants [Member] | Contractual term
Common stock disclosure
Fair value assumptions | $		5
Wainwright 2020 Placement Agent Warrants [Member] | Expected dividend yield
Common stock disclosure
Fair value assumptions | $		0
Placement Agent Warrants
Common stock disclosure
Percentage of aggregate number of shares available			6.50%
Exercise price (in dollars per unit) | $ / shares			$ 3.4375	$ 1.00		$ 1.00
Number of Warrants | shares			165,455	1,206,562		1,206,562
Shares issued on exercise of warrants | shares					0	12,188	0
Series B Prefunded Warrants October 2020
Common stock disclosure
Proceeds from exercise of warrants | $						$ 8,500,000
Number of Warrants | shares				0		0
Shares issued on exercise of warrants | shares						10,620,682
March 2020 Series A Warrants
Common stock disclosure
Number of shares issued (in shares) | shares			955,613
Common Stock
Common stock disclosure
Number of shares issued (in shares) | shares					1,715,240		2,670,853
Underwritten Public Offering March 2020 [Member]
Common stock disclosure
Number of shares issued (in shares) | shares			955,613
Underwritten Public Offering March 2020 [Member] | Common Stock
Common stock disclosure
Equity issuance (in price per unit) | $ / shares			$ 2.75
Wainwright 2020 Placement Agent Warrants [Member]
Common stock disclosure
Percentage of warrants issued as a percentage of the warrants issued to the investors		6.50%
Proceeds from issuance of common stock and warrants, net of commissions and issuance costs | $			$ 6,000,000.0
October 2020 Offering [Member]
Common stock disclosure
Number of shares issued (in shares) | shares	11,785,000
Equity issuance (in price per unit) | $ / shares	$ 0.80
Fair value of warrants | $	$ 8,700,000
October 2020 Offering [Member] | Expected volatility
Common stock disclosure
Fair value assumptions	119.13
October 2020 Offering [Member] | Risk-free interest rate
Common stock disclosure
Fair value assumptions	0.35
October 2020 Offering [Member] | Contractual term
Common stock disclosure
Warrant expiration term (in years)	5 years
October 2020 Offering [Member] | Expected dividend yield
Common stock disclosure
Fair value assumptions	0
October 2020 Offering [Member] | Series A Warrants [Member]
Common stock disclosure
Equity issuance (in price per unit) | $ / shares	$ 0.80
Number of warrants to purchase aggregate number of shares | shares	11,785,000
October 2020 Offering [Member] | Wainwright 2020 Placement Agent Warrants [Member]
Common stock disclosure
Percentage of shares purchased by placement agent	6.50%
Number of warrants to purchase aggregate number of shares | shares	1,218,750
Exercise price (in dollars per unit) | $ / shares	$ 1.00
October 2020 Offering [Member] | Series A Prefunded Warrants October 2020
Common stock disclosure
Number of shares issued (in shares) | shares	6,965,000
Equity issuance (in price per unit) | $ / shares	$ 0.80
Fair value of warrants | $	$ 551,300
October 2020 Offering [Member] | Series B Prefunded Warrants October 2020
Common stock disclosure
Number of warrants to purchase aggregate number of shares | shares	6,965,000
Exercise price (in dollars per unit) | $ / shares	$ 0.00001
Fair value of warrants | $	$ 5,600,000