STOCKHOLDERS EQUITY - Common Stock Issued, Net of Issuance Costs (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions				12 Months Ended		17 Months Ended
	Aug. 20, 2021	Dec. 04, 2020	Apr. 14, 2017	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022
Net proceeds from common stock				$ 25,901	$ 84,142
2020 Lincoln Park PA
Maximum aggregate offering price		$ 100,000
Period for financing from common stock		36 months
Number of common stock issued					6.1
Net proceeds from common stock					$ 34,600
Threshold average sale price per share of common stock		$ 6.15
Registered share available for future sales		16.0
2020 Lincoln Park PA | Maximum
Percentage of common stock issuable		19.99%
2020 Lincoln Park PA | Lincoln Park
Number of common stock issued						6.3
Minimum percentage considered for not to sale common stock		9.99%
Registered share available for future sales				9.7		9.7
Amount available for future sales				$ 20,800		$ 20,800
ATM Offering Agreement
Number of common stock issued				13.0
Net proceeds from common stock	$ 50,000			$ 25,900
ATM Offering Agreement | Cantor Fitzgerald & Co
Number of common stock issued				13.0	10.0
Net proceeds from common stock				$ 25,900	$ 49,500
ATM Offering Agreement | Cantor Fitzgerald & Co | Maximum
Sales commission percentage			2.50%
Controlled Equity Offering Sales Agreement with Cantor Fitzgerald and Co.
Net proceeds from common stock				$ 29,200