CAPITAL STOCK - Narrative (Details)	1 Months Ended					3 Months Ended
	Oct. 31, 2021 USD ($) $ / shares shares	Jul. 31, 2021 USD ($) $ / shares shares	Oct. 31, 2020 USD ($) $ / shares shares	Jun. 30, 2020 USD ($) $ / shares shares	Feb. 29, 2020 USD ($) $ / shares shares	Mar. 31, 2022 USD ($) $ / shares shares	Mar. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2021 $ / shares shares	Apr. 30, 2020 USD ($)
Class of Stock [Line Items]
Common stock, shares authorized						300,000,000		300,000,000
Common stock, par value (in usd per share) | $ / shares						$ 0.01		$ 0.01
Sale of stock, expiration term			5 years
Proceeds from the exercise of warrants | $						$ 0	$ 8,969,000
Common stock, shares issued						119,377,286		119,377,286
Aggregate purchase price for stock and warrants | $				$ 200,000
Sale of stock additional shares authorized amount | $						$ 26,900,000
Sale of stock, percentage of commission							0.03
Preferred shares authorized						5,000,000
Temporary equity, par or stated value per share (in dollars per share) | $ / shares						$ 0.01
Preferred stock shares outstanding						0
Lincoln Park
Class of Stock [Line Items]
Purchase obligation | $					$ 28,000,000
Purchase obligation, term					36 months
Maximum commitment purchase amount | $					$ 1,000,000
Percentage of ownership after transaction					9.99%
Common stock warrants
Class of Stock [Line Items]
Exercise price (in usd per share) | $ / shares							$ 0.72
Pre-Funded Warrant
Class of Stock [Line Items]
Exercise price (in usd per share) | $ / shares			$ 0.001	$ 0.001
October 2021 Offering
Class of Stock [Line Items]
Number of shares issued in transaction	30,263,400
Closing sale price (in usd per share) | $ / shares	$ 0.38
Consideration received on transaction | $	$ 10,300,000
July 2021 Offering
Class of Stock [Line Items]
Number of shares issued in transaction		12,983,871
Closing sale price (in usd per share) | $ / shares		$ 0.62
Consideration received on transaction | $		$ 7,300,000
October 2020 Offering
Class of Stock [Line Items]
Consideration received on transaction | $			$ 13,700,000
Number of shares authorized to be repurchased			20,833,322
Exercise price (in usd per share) | $ / shares							$ 0.72
Commissions discounts and other offering expenses | $			$ 1,300,000
Stock issuable upon warrants (in shares)							12,427,387
Proceeds from the exercise of warrants | $							$ 8,900,000
October 2020 Offering | Common Stock
Class of Stock [Line Items]
Number of shares issued in transaction			19,003,510
October 2020 Offering | Common stock warrants
Class of Stock [Line Items]
Closing sale price (in usd per share) | $ / shares			$ 0.72
Number of shares authorized to be repurchased			1,829,812
October 2020 Offering | Pre-Funded Warrant
Class of Stock [Line Items]
Closing sale price (in usd per share) | $ / shares			$ 0.719
Common Stock Public Offering
Class of Stock [Line Items]
Exercise price (in usd per share) | $ / shares				$ 1.25			$ 1.25
Sale of stock, expiration term				5 years
Stock issuable upon warrants (in shares)							17,500
Proceeds from the exercise of warrants | $							$ 22,000
Common stock, shares issued				14,790,133
Net proceeds from common stock public offering | $				$ 18,700,000
Underwriting commissions, discounts, and other offering expenses | $				$ 1,400,000
Common Stock Public Offering | Pre-Funded Warrant
Class of Stock [Line Items]
Stock issuable upon warrants (in shares)				2,709,867
Public offering price (in usd per share) | $ / shares				$ 1.15
Common Stock Public Offering | Accompanying Common Warrant
Class of Stock [Line Items]
Stock issuable upon warrants (in shares)				17,500,000
Public offering price (in usd per share) | $ / shares				$ 1.149
2021 At Market Issuance Sales Agreement
Class of Stock [Line Items]
Aggregate offering price | $							$ 50,000,000
Sale of stock additional shares authorized amount | $						$ 46,000,000
2020 At Market Issuance Sales Agreement
Class of Stock [Line Items]
Number of shares issued in transaction							1,083,548
Closing sale price (in usd per share) | $ / shares							$ 1.55
Consideration received on transaction | $							$ 1,600,000
Aggregate offering price | $									$ 8,000,000
Sale of stock additional shares authorized amount | $						$ 2,600,000
Private Placement Offerings
Class of Stock [Line Items]
Common stock, shares issued					950,000
Aggregate gross purchase price | $					$ 2,000,000
Private Placement Offerings | Series A
Class of Stock [Line Items]
Exercise price (in usd per share) | $ / shares					$ 0.01
Stock issuable upon warrants (in shares)					606,420
Private Placement Offerings | Series B
Class of Stock [Line Items]
Exercise price (in usd per share) | $ / shares					$ 1.16
Stock issuable upon warrants (in shares)					1,556,420
Purchase Agreement | Lincoln Park
Class of Stock [Line Items]
Closing sale price (in usd per share) | $ / shares					$ 3.00
Maximum shares allowed to be purchased					100,000
Maximum share increase amount					125,000
Regular Purchase | Lincoln Park
Class of Stock [Line Items]
Closing sale price (in usd per share) | $ / shares					$ 5.00
Maximum share increase amount					150,000