Condensed Consolidated Statements of Stockholders' Equity (Deficit) (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Total
Balances at Dec. 31, 2019	$ 22	$ 270,555	$ (284,895)	$ (14,318)
Balances (in shares) at Dec. 31, 2019	22,806,890
Issuance of common stock, net of expenses		65		65
Issuance of common stock, net of expenses, shares	40,000
Issuance of common stock in exchange for services		13		13
Issuance of common stock in exchange for services, shares	5,868
Issuance of stock options for payment of compensation		133		133
Issuance of common stock for payment of compensation		19		19
Issuance of common stock for payment of compensation, shares	9,599
Issuance of warrant for services		1		1
Stock-based compensation expense		265		265
Net loss			(2,467)	(2,467)
Balances at Mar. 31, 2020	$ 22	271,051	(287,362)	(16,289)
Balances (in shares) at Mar. 31, 2020	22,862,357
Balances at Dec. 31, 2019	$ 22	270,555	(284,895)	(14,318)
Balances (in shares) at Dec. 31, 2019	22,806,890
Issuance of warrant for services				2,066
Net loss				(57,240)
Balances at Sep. 30, 2020	$ 52	419,353	(342,135)	77,270
Balances (in shares) at Sep. 30, 2020	51,616,508
Balances at Mar. 31, 2020	$ 22	271,051	(287,362)	(16,289)
Balances (in shares) at Mar. 31, 2020	22,862,357
Issuance of common stock, net of expenses	$ 17	66,987		67,004
Issuance of common stock, net of expenses, shares	16,505,744
Issuance of common stock for conversion of debt	$ 3	4,313		4,316
Issuance of common stock for conversion of debt, shares	2,397,916
Issuance of common stock in exchange for services		57		57
Issuance of common stock in exchange for services, shares	15,463
Issuance of stock options for payment of compensation		32		32
Issuance of common stock for payment of compensation		29		29
Issuance of common stock for payment of compensation, shares	4,915
Issuance of warrant for services		117		117
Issuance of common stock upon option exercise
Issuance of common stock upon option exercise, shares	188,521
Stock-based compensation expense		357		357
Net loss			(24,022)	(24,022)
Balances at Jun. 30, 2020	$ 42	342,943	(311,384)	31,601
Balances (in shares) at Jun. 30, 2020	41,974,916
Issuance of common stock, net of expenses	$ 10	72,681		72,691
Issuance of common stock, net of expenses, shares	9,200,000
Issuance of common stock in exchange for services		142		142
Issuance of common stock in exchange for services, shares	13,733
Issuance of stock options for payment of compensation		15		15
Issuance of common stock for payment of compensation		30		30
Issuance of common stock for payment of compensation, shares	2,803
Issuance of warrant for services		1,948		1,948
Issuance of common stock upon option exercise		572		572
Issuance of common stock upon option exercise, shares	202,147
Issuance of common stock upon warrant exercise		10		10
Issuance of common stock upon warrant exercise, shares	222,909
Stock-based compensation expense		1,012		1,012
Net loss			(30,751)	(30,751)
Balances at Sep. 30, 2020	$ 52	419,353	(342,135)	77,270
Balances (in shares) at Sep. 30, 2020	51,616,508
Balances at Dec. 31, 2020	$ 52	419,923	(374,430)	45,545
Balances (in shares) at Dec. 31, 2020	51,626,508
Issuance of common stock, net of expenses	$ 2	36,104		36,106
Issuance of common stock, net of expenses, shares	1,796,858
Issuance of common stock upon option exercise		429		429
Issuance of common stock upon option exercise, shares	233,323
Stock-based compensation expense		510		510
Net loss			(65,567)	(65,567)
Balances at Mar. 31, 2021	$ 54	456,966	(439,997)	17,023
Balances (in shares) at Mar. 31, 2021	53,656,689
Balances at Dec. 31, 2020	$ 52	419,923	(374,430)	45,545
Balances (in shares) at Dec. 31, 2020	51,626,508
Issuance of warrant for services
Net loss				(203,109)
Balances at Sep. 30, 2021	$ 60	559,835	(577,539)	(17,644)
Balances (in shares) at Sep. 30, 2021	60,017,333
Balances at Mar. 31, 2021	$ 54	456,966	(439,997)	17,023
Balances (in shares) at Mar. 31, 2021	53,656,689
Issuance of common stock, net of expenses	$ 5	94,167		94,172
Issuance of common stock, net of expenses, shares	5,427,017
Issuance of common stock upon option exercise		1,432		1,432
Issuance of common stock upon option exercise, shares	319,153
Stock-based compensation expense		1,871		1,871
Net loss			(70,803)	(70,803)
Balances at Jun. 30, 2021	$ 59	554,436	(510,800)	43,695
Balances (in shares) at Jun. 30, 2021	59,402,859
Issuance of common stock, net of expenses	$ 1	3,861		3,862
Issuance of common stock, net of expenses, shares	600,933
Issuance of common stock upon option exercise		104		104
Issuance of common stock upon option exercise, shares	13,541
Stock-based compensation expense		1,434		1,434
Net loss			(66,739)	(66,739)
Balances at Sep. 30, 2021	$ 60	$ 559,835	$ (577,539)	$ (17,644)
Balances (in shares) at Sep. 30, 2021	60,017,333