STOCKHOLDERS' EQUITY, Common Stock (Details) - USD ($)				3 Months Ended		6 Months Ended
	Sep. 03, 2021	Feb. 03, 2021	Aug. 05, 2020	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Common Stock [Abstract]
Common stock, shares authorized (in shares)						300,000,000		300,000,000
Common stock, par value (in dollars per share)						$ 0.0001		$ 0.0001
Common stock, shares outstanding (in shares)						196,356,232		195,813,817
Warrants outstanding (in shares)						50,523,424
Common stock, available for issuance (in shares)						53,120,344
Common stock issuable under agreement				$ 17,189,560	$ 41,912,515
Net proceeds from issuance of common stock						$ 0	$ 59,102,075
Sale Agreement [Member] | Jefferies LLC [Member] | Maximum [Member]
Common Stock [Abstract]
Common stock issuable under agreement			$ 50,000,000
Sale Agreement, Amended [Member] | Jefferies LLC [Member] | Maximum [Member]
Common Stock [Abstract]
Common stock issuable under agreement		$ 105,400,000
Distribution Agreement [Member] | Raymond James & Associates Inc. [Member]
Common Stock [Abstract]
Common stock issuable under agreement						$ 42,800,000
Common stock shares sold during the period (in shares)						0
Distribution Agreement [Member] | Raymond James & Associates Inc. [Member] | Maximum [Member]
Common Stock [Abstract]
Common stock issuable under agreement	$ 50,000,000
Common Stock [Member]
Common Stock [Abstract]
Warrants outstanding (in shares)						13,556,898		4,528,160
Common stock issuable under agreement				$ 883	$ 1,808
Common stock shares sold during the period (in shares)				8,827,045	18,080,708
Common Stock [Member] | Sale Agreement [Member] | Jefferies LLC [Member]
Common Stock [Abstract]
Common stock shares sold during the period (in shares)							26,907,753
Net proceeds from issuance of common stock							$ 59,100,000