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SHARE CAPITAL - Additional information (Details)														1 Months Ended			3 Months Ended	12 Months Ended		36 Months Ended
SHARE CAPITAL - Additional information (Details)	Jan. 20, 2021 director	Oct. 01, 2020 USD ($)	Sep. 22, 2020 shares	Sep. 14, 2020 USD ($) shares	Aug. 11, 2020 USD ($) item $ / shares shares	Jul. 05, 2020 USD ($) item $ / shares shares	Jun. 07, 2020 USD ($) item $ / shares shares	Mar. 18, 2020 USD ($) $ / shares shares	Feb. 03, 2020 USD ($) item $ / shares shares	Jan. 20, 2020 USD ($) item $ / shares shares	Dec. 09, 2019	Sep. 13, 2018 USD ($) item $ / shares shares	Dec. 07, 2016 shares	Sep. 30, 2019 USD ($) item $ / shares shares	Jun. 30, 2019 USD ($) item $ / shares shares	May 22, 2018 USD ($) shares	Dec. 31, 2020 USD ($) Vote $ / shares shares	Dec. 31, 2020 USD ($) Vote $ / shares shares	Dec. 31, 2018 USD ($)	Dec. 31, 2020 USD ($) Vote $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Number Of Voting Rights \| Vote																	1	1		1
Reverse stock split ratio											0.1
Shares of Common Stock remain available for grant under the plan \| shares																	1,493,626	1,493,626		1,493,626
Unrecognized compensation cost																	$ 4,200,000	$ 4,200,000		$ 4,200,000
Unrecognized weighted average period																		1 year 1 month 6 days
Proceeds from Stock Options Exercised																				$ 0
Convertible notes conversions																			$ 2,285,000
Converted instrument, shares issued \| shares													2,384,673
Proceeds from private placement								$ 41,300,000
Exercise price of warrants (in dollars per share) \| $ / shares																	$ 2.36	$ 2.36		$ 2.36
Proceeds from Warrant Exercises																		$ 472,000
Gross proceeds																		$ 4,867,000
4.5% Convertible Notes [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Principal amount																$ 3,423,000
Converted instrument, shares issued \| shares																261,363
Debt conversion converted instrument amount, cash																$ 2,230,000
2006 Employee Stock Incentive Plan Member
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for issuance under share-based payment arrangement \| shares																	5,725,171	5,725,171		5,725,171
Private Placement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued (in shares) \| shares				200,000				17,604,423
Share Price \| $ / shares								$ 2.485
Purchase price (in dollars per share) \| $ / shares								$ 2.485
Proceeds from private placement								$ 43,700,000
Number of shares per warrant issued \| shares								1
Exercise price of warrants (in dollars per share) \| $ / shares								$ 2.36
Proceeds from Warrant Exercises				$ 472,000
ATM Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued (in shares) \| shares																	1,428,571	1,428,571
Gross proceeds																	$ 5,000,000	$ 5,000,000.0
Sale of stock, maximum offering price		$ 30,000,000
ATM Shares \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Commission (as a percent)		3.00%
Vice President [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price \| $ / shares					$ 3.59
Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period												10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures \| shares												636,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price \| $ / shares												$ 5.10
Vesting period												4 years
Fair value at grant												$ 1,900,000
Dividend Yield												0.00%
Expected Volatility Rate												64.30%
Risk Free Interest Rate												2.90%
Expected Term												6 years
Share-based Payment Arrangement, Option [Member] \| Officers And Certain Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures \| shares												236,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price \| $ / shares												$ 5.10
Number of equal quarterly increments \| item												16
Share-based Payment Arrangement, Option [Member] \| Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures \| shares												400,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price \| $ / shares												$ 5.60
Share-based Payment Arrangement, Option [Member] \| Sr. Vice President And Chief Development Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period							10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price \| $ / shares							$ 3.59
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross \| shares							196,995
Vesting period							4 years
Number of equal quarterly increments \| item							16
Fair value at grant							$ 500,000
Dividend Yield							0.00%
Expected Volatility Rate							80.43%
Risk Free Interest Rate							0.59%
Expected Term							6 years
Share-based Payment Arrangement, Option [Member] \| Senior Vice President, Operations [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period					10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price \| $ / shares					$ 3.59
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross \| shares					122,656
Vesting period					4 years
Number of equal quarterly increments \| item					16
Fair value at grant					$ 300,000
Dividend Yield					0.00%
Expected Volatility Rate					80.51%
Risk Free Interest Rate					0.365%
Expected Term					6 years
Share-based Payment Arrangement, Option [Member] \| New Vice President Research And Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period						10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price \| $ / shares						$ 3.73
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross \| shares						129,771
Vesting period						4 years
Number of equal quarterly increments \| item						16
Fair value at grant						$ 329,000
Dividend Yield						0.00%
Expected Volatility Rate						80.60%
Risk Free Interest Rate						0.395%
Expected Term						6 years
Share-based Payment Arrangement, Option [Member] \| Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period															10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price \| $ / shares															$ 4.69
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross \| shares															160,000
Vesting period															4 years
Number of equal quarterly increments \| item															16
Fair value at grant															$ 449,000
Dividend Yield															0.00%
Expected Volatility Rate															65.30%
Risk Free Interest Rate															1.80%
Expected Term															6 years
Share-based Payment Arrangement, Option [Member] \| Chief Financial Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period														10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price \| $ / shares														$ 2.00
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross \| shares														80,000
Vesting period														4 years
Number of equal quarterly increments \| item														16
Fair value at grant														$ 97,000
Dividend Yield														0.00%
Expected Volatility Rate														66.48%
Risk Free Interest Rate														1.695%
Expected Term														6 years
Share-based Payment Arrangement, Option [Member] \| Certain Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period							10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price \| $ / shares							$ 3.66
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross \| shares							760,311
Vesting period							4 years
Number of equal quarterly increments \| item							16
Fair value at grant							$ 1,900,000
Dividend Yield							0.00%
Expected Volatility Rate							80.49%
Risk Free Interest Rate							0.45%
Expected Term							6 years
Share-based Payment Arrangement, Option [Member] \| Chairman, Board of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period									10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price \| $ / shares									$ 3.70
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross \| shares									240,000
Vesting period									4 years
Number of equal quarterly increments \| item									16
Fair value at grant									$ 593,000
Dividend Yield									0.00%
Expected Volatility Rate									76.91%
Risk Free Interest Rate									1.40%
Expected Term									6 years
Share-based Payment Arrangement, Option [Member] \| Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Of Directors \| director	5
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period										10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price \| $ / shares										$ 3.55
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross \| shares										200,000
Vesting period										4 years
Number of equal quarterly increments \| item										16
Fair value at grant										$ 475,000
Dividend Yield										0.00%
Expected Volatility Rate										76.62%
Risk Free Interest Rate										1.685%
Expected Term										6 years
Restricted Stock Units [Member] \| Chief Financial Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate value of Restricted Stock Units that will be granted, contingent upon certain conditions														$ 100,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period																		4 years
Fair value at grant																	$ 2,492,000	$ 2,492,000		$ 2,492,000
Restricted Stock [Member] \| President and Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross \| shares					447,927
Vesting period					4 years
Number of equal quarterly increments \| item					16
Fair value at grant					$ 1,600,000
Restricted Stock [Member] \| Senior Vice President And Chief Financial Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross \| shares					246,146
Number of shares vested \| shares			27,855
Number of non-vested shares \| shares					218,291
Vesting period					4 years
Number of equal quarterly increments \| item					16
Fair value at grant					$ 900,000