Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock, Common [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2019	$ 109	$ 739,956	$ (234)	$ (701,216)	$ 38,615
Balance (in shares) at Dec. 31, 2019	109,425,243
Treasury stock, balance (in shares) at Dec. 31, 2019					41,309
Issuance of common stock in connection with exercise of options		146			$ 146
Issuance of common stock in connection with exercise of options (in shares)	35,814				35,814
Issuance of restricted stock	$ 5	(5)
Issuance of restricted stock (in shares)	4,909,829
Forfeiture of restricted stock (in shares)	(128,666)
Offering costs paid					$ 29,900
Issuance of common stock in public offering	$ 17	462,212			462,229
Issuance of common stock in public offering (in shares)	17,043,000
Issuance of common stock in At-the-Market offerings (net of offering costs)	$ 10	217,442			217,452
Issuance of common stock in At-the-Market offerings (net of offering costs) (in shares)	9,332,386
Compensation in respect of restricted stock granted to employees, directors and consultants		80,289			80,289
Net loss				(279,381)	$ (279,381)
Treasury stock, balance (in shares) at Dec. 31, 2020					41,309
Balance at Dec. 31, 2020	$ 141	1,500,040	(234)	(980,597)	$ 519,350
Balance (in shares) at Dec. 31, 2020	140,617,606
Issuance of common stock in connection with exercise of options		216			$ 216
Issuance of common stock in connection with exercise of options (in shares)	52,694				52,694
Issuance of restricted stock	$ 2	(2)
Issuance of restricted stock (in shares)	2,738,974
Warrants issued with debt financing		2,195			$ 2,195
Forfeiture of restricted stock (in shares)	(189,231)
Offering costs paid		(204)			(204)
Issuance of common stock in At-the-Market offerings (net of offering costs)		2,423			2,423
Issuance of common stock in At-the-Market offerings (net of offering costs) (in shares)	72,000
Compensation in respect of restricted stock granted to employees, directors and consultants		61,274			61,274
Net loss				(348,101)	$ (348,101)
Treasury stock, balance (in shares) at Dec. 31, 2021					41,309
Balance at Dec. 31, 2021	$ 143	1,565,942	(234)	(1,328,698)	$ 237,153
Balance (in shares) at Dec. 31, 2021	143,292,043
Issuance of common stock in connection with exercise of options		584			$ 584
Issuance of common stock in connection with exercise of options (in shares)	142,409				142,409
Issuance of restricted stock	$ 5	(5)
Issuance of restricted stock (in shares)	5,179,201
Forfeiture of restricted stock	$ (2)	2
Forfeiture of restricted stock (in shares)	(2,186,956)
Compensation in respect of restricted stock granted to employees, directors and consultants		19,185			$ 19,185
Net loss				(198,335)	$ (198,335)
Treasury stock, balance (in shares) at Dec. 31, 2022					41,309
Balance at Dec. 31, 2022	$ 146	$ 1,585,708	$ (234)	$ (1,527,033)	$ 58,587
Balance (in shares) at Dec. 31, 2022	146,426,697