STOCKHOLDERS' EQUITY - Additional information (Details)												12 Months Ended
	Dec. 13, 2023 USD ($) $ / shares shares	Sep. 18, 2023 USD ($) shares	Aug. 28, 2023 shares	Jul. 10, 2023 USD ($) shares	Jul. 07, 2023 USD ($) shares	Jan. 23, 2023 USD ($) shares	Aug. 10, 2022 USD ($) shares	Apr. 01, 2022	Dec. 30, 2021 USD ($)	Apr. 12, 2021 USD ($) shares	Apr. 12, 2021 USN ($) shares	Dec. 31, 2023 USD ($) item $ / shares shares	Dec. 31, 2023 USN ($) shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2022 USN ($) shares	Dec. 31, 2021 USD ($) shares	Jul. 14, 2021 USD ($)	Dec. 31, 2020 shares	Jun. 30, 2019 shares	May 31, 2019 shares
STOCKHOLDERS' EQUITY
Number of preferred stock authorized | shares												5,000,000		5,000,000	5,000,000				5,000,000
Common stock, shares authorized | shares												100,000,000		100,000,000	100,000,000				100,000,000	50,000,000
Issuance of common stock | shares												0	0
Warrant Exercise Price per Share | $ / shares												$ 2.00
Aggregate registered amount for offerings																	$ 150,000,000
Number of option granted | shares												2,601,880	2,601,880	4,086,205	4,086,205	2,051,980
Number of long-term incentive plans | item												2
Allocated share-based compensation expense												$ 3,329,000		$ 3,424,000		$ 4,021,000
Stock or unit option plan expense												$ 260,000
Grant date exercise price range | $ / shares												$ 1.11
Total unrecognized compensation cost related to stock options												$ 4,868,000
Amortized period												42 months	42 months
Vested | shares												(1,273,328)	(1,273,328)
Issuance of restricted stock options												$ 403,939		$ 380,091		$ 928,417
Outstanding | shares												10,548,174		9,474,824	9,474,824	6,885,978		5,165,204
Forfeited | shares												974,555	974,555	1,270,155	1,270,155	138,037
Employees
STOCKHOLDERS' EQUITY
Number of option granted | shares										1,323,400	1,323,400
Percentage of milestone activity met by the company								19.00%
Grant date fair value of unvested options											$ 7,042,000
Stock or unit option plan expense												$ 320,000		$ 314,000
Employee Stock
STOCKHOLDERS' EQUITY
Outstanding | shares												281,000		196,900	196,900	281,880
December 13, 2023 Offering
STOCKHOLDERS' EQUITY
Issuance of common stock | shares	7,733,090
Warrants to purchase shares | shares	2,706,561
Number of common stock purchased by each warrant | shares	0.35
Average selling price | $ / shares	$ 1.33
Net proceeds excluding proceeds received upon exercise of warrants	$ 9,785,000
Warrant Exercise Price per Share | $ / shares	$ 2.00
Net proceeds from issuance of stock	$ 10,285,000
Common Stock
STOCKHOLDERS' EQUITY
Issuance of common stock | shares												10,389,554	10,389,554
Stock or unit option plan expense												$ 104,000
Issuance of restricted stock options												130		$ 145		$ 107
Common Stock | First anniversary of the date of the grant
STOCKHOLDERS' EQUITY
Unvested options in fair value					$ 426,000
Restricted stock
STOCKHOLDERS' EQUITY
Stock or unit option plan expense												$ 0
Stock issued during period, shares, restricted stock award, gross | shares			60,000			30,000						250,000	250,000
Stock issued during period, value, restricted stock sward, gross						$ 64,200						$ 883,000
RSU Forfeited | shares						2,500						204,087	204,087
Issuance of restricted stock options												$ 80,000		(16,000)
Options to grant (in shares) | shares												385,000	385,000
Employee stock options
STOCKHOLDERS' EQUITY
Stock or unit option plan expense												$ 113,000		101,000
Employee stock options | Employees
STOCKHOLDERS' EQUITY
Aggregate intrinsic value												135,000
Grant date fair value of these unvested options												135,000
Stock or unit option plan expense												34,000
Executive Officer, Director And Non-executive Officer Employees [Member] | December 13, 2023 Offering
STOCKHOLDERS' EQUITY
Net proceeds excluding proceeds received upon exercise of warrants	$ 435,000
Employee one
STOCKHOLDERS' EQUITY
Number of options granted | shares							1,163,800
Allocated share-based compensation expense												1,381,000
Employee Stock
STOCKHOLDERS' EQUITY
Number of options granted | shares					1,138,750
Employee Stock | Second anniversary of the date of the grant
STOCKHOLDERS' EQUITY
Unvested options in fair value					$ 178,000
Employee Stock | Second anniversary of the date of the grant
STOCKHOLDERS' EQUITY
Unvested options in fair value					$ 2,665,000
Employee Stock | Common Stock
STOCKHOLDERS' EQUITY
Number of options granted | shares					56,130
Employee two
STOCKHOLDERS' EQUITY
Number of option granted | shares							772,905
Aggregate intrinsic value												917,000
Grant date fair value of these unvested options												917,000
Allocated share-based compensation expense					$ 59,000							201,000		90,000
Board of directors
STOCKHOLDERS' EQUITY
Number of option granted | shares							113,850
Board of directors | First anniversary of the date of the grant
STOCKHOLDERS' EQUITY
Unvested options in fair value					$ 234,000
Board of directors | Common Stock
STOCKHOLDERS' EQUITY
Number of option granted | shares					100,000
Chief Executive Officer
STOCKHOLDERS' EQUITY
Stock or unit option plan expense												23,000
Options to purchase common stock vested | shares				70,000
Chief Executive Officer | First anniversary of the date of the grant
STOCKHOLDERS' EQUITY
Unvested options in fair value					$ 47,000
Chief Executive Officer | Common Stock
STOCKHOLDERS' EQUITY
Number of options granted | shares					20,000
Senior managers
STOCKHOLDERS' EQUITY
Number of option granted | shares					424,000
Stock or unit option plan expense												285,000
Senior managers | First anniversary of the date of the grant
STOCKHOLDERS' EQUITY
Unvested options in fair value					$ 992,000
Senior managers | Common Stock
STOCKHOLDERS' EQUITY
Number of options granted | shares					182,000
Senior manager one
STOCKHOLDERS' EQUITY
Number of option granted | shares							473,750
Aggregate intrinsic value												562,000
Grant date fair value of these unvested options												562,000
Stock or unit option plan expense												107,000		$ 161,000
Senior manager two | Employee stock options
STOCKHOLDERS' EQUITY
Number of option granted | shares							1,365,000
Aggregate intrinsic value												1,620,000
Grant date fair value of these unvested options												1,620,000
Stock or unit option plan expense													$ 0		$ 0
Existing 2022-2025 performance
STOCKHOLDERS' EQUITY
Number of option granted | shares					115,000
Stock or unit option plan expense												$ 0
Existing 2022-2025 performance | Second anniversary of the date of the grant
STOCKHOLDERS' EQUITY
Unvested options in fair value					$ 320,000
MR. D Amico
STOCKHOLDERS' EQUITY
Number of options granted | shares				25,000
MR. D Amico | First anniversary of the date of the grant
STOCKHOLDERS' EQUITY
Options to grant (in shares) | shares				15,000
MR. D Amico | Common Stock
STOCKHOLDERS' EQUITY
Shares issued other (in shares) | shares				215,000
MR. D Amico | Restricted stock
STOCKHOLDERS' EQUITY
Number of option granted | shares				15,000
Options to purchase common stock vested | shares				45,000
Shares vested and expected vest value				$ 157,000
Revision of prior period adjustment
STOCKHOLDERS' EQUITY
Outstanding | shares														1,365,000	1,365,000
2006 Stock Option Plan
STOCKHOLDERS' EQUITY
Common stock reserved for issuance | shares												2,400,000
Outstanding | shares												320,000
2014 Stock Option Plan
STOCKHOLDERS' EQUITY
Common stock reserved for issuance | shares												13,400,000
Outstanding | shares												647,000
April 12, 2021 performance based award | Restricted stock
STOCKHOLDERS' EQUITY
Stock issued during period, shares, restricted stock award, gross | shares										235,765	235,765
Stock issued during period, value, restricted stock sward, gross										$ 2,120,000
Issuance of restricted stock options												$ (245,000)		$ 226,000
April 12, 2021 performance based award | Restricted stock | First anniversary of the date of the grant
STOCKHOLDERS' EQUITY
Vesting percentage										33.30%	33.30%
April 12, 2021 performance based award | Restricted stock | Second anniversary of the date of the grant
STOCKHOLDERS' EQUITY
Vesting percentage										33.30%	33.30%
April 12, 2021 performance based award | Restricted stock | Second anniversary of the date of the grant
STOCKHOLDERS' EQUITY
Vesting percentage										33.30%	33.30%
August 10, 2022 performance based award
STOCKHOLDERS' EQUITY
Allocated share-based compensation expense												311,000
Stock or unit option plan expense														180,000
August 10, 2022 performance based award | Restricted stock
STOCKHOLDERS' EQUITY
Stock issued during period, shares, restricted stock award, gross | shares							288,500
Stock issued during period, value, restricted stock sward, gross							$ 563,000
Issuance of restricted stock options												267,000		260,000
August 10, 2022 performance based award | Restricted stock | First anniversary of the date of the grant
STOCKHOLDERS' EQUITY
Vesting percentage							33.30%
August 10, 2022 performance based award | Restricted stock | Second anniversary of the date of the grant
STOCKHOLDERS' EQUITY
Vesting percentage							33.30%
August 10, 2022 performance based award | Restricted stock | Second anniversary of the date of the grant
STOCKHOLDERS' EQUITY
Vesting percentage							33.30%
July 07, 2023 performance based award | Restricted stock
STOCKHOLDERS' EQUITY
Issuance of restricted stock options												213,000		0
September 18, 2023 performance based award
STOCKHOLDERS' EQUITY
Stock issued during period, shares, restricted stock award, gross | shares		45,000
Stock issued during period, value, restricted stock sward, gross		$ 89,000
September 18, 2023 performance based award | Restricted stock
STOCKHOLDERS' EQUITY
Issuance of restricted stock options												$ 55,000		0
Jefferies LLC and B. Riley FBR, Inc
STOCKHOLDERS' EQUITY
Issuance of common stock | shares												2,656,464	2,656,464
Aggregate offering price									$ 25,000,000
Net proceeds from issuance of stock													$ 4,532,000	$ 45,000
Commission rate (as a percent)												3.00%
Net proceeds from issuance of stock												$ 61,000
Average selling price | $ / shares												$ 1.76