Condensed Consolidated Statements of Changes in Stockholders’ Equity (Unaudited) - USD ($) $ in Thousands	Common Stock	Preferred Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Deficit	Total
Balance at at Dec. 31, 2019			$ 155,062	$ (264)	$ (144,266)	$ 10,532
Balance at (in Shares) at Dec. 31, 2019	4,825,549	5,559		3
Issuance of common stock, common warrants and prefunded warrants, net of offering cost			6,559			6,559
Issuance of common stock, common warrants and prefunded warrants, net of offering cost (in Shares)	3,245,745
Issuance of common stock, net of offering cost	$ 2		17,843			17,845
Issuance of common stock, net of offering cost (in Shares)	16,090,909
Common warrant and prefunded warrant exercise	$ 1		7,203			7,204
Common warrant and prefunded warrant exercise (in Shares)	10,758,016
Net loss					(10,646)	(10,646)
Balance at June 30, 2021 at Jun. 30, 2020	$ 3		186,667	$ (264)	(154,912)	31,494
Balance at June 30, 2021 (in Shares) at Jun. 30, 2020	34,920,219	5,559		3
Balance at at Mar. 31, 2020	$ 2		173,836	$ (264)	(152,599)	20,975
Balance at (in Shares) at Mar. 31, 2020	20,857,909	5,559		3
Issuance of common stock, net of offering cost	$ 1		12,766			12,768
Issuance of common stock, net of offering cost (in Shares)	14,000,000
Common warrant and prefunded warrant exercise			65			65
Common warrant and prefunded warrant exercise (in Shares)	62,310
Net loss					(2,313)	(2,313)
Balance at June 30, 2021 at Jun. 30, 2020	$ 3		186,667	$ (264)	(154,912)	31,494
Balance at June 30, 2021 (in Shares) at Jun. 30, 2020	34,920,219	5,559		3
Balance at at Dec. 31, 2020	$ 3		186,482	$ (264)	(156,603)	29,618
Balance at (in Shares) at Dec. 31, 2020	34,920,219	5,559		3
Issuance of common stock and warrants (net of offering costs of $8,260)	$ 6		77,983			77,989
Issuance of common stock and warrants (net of offering costs of $8,260) (in Shares)	53,905,927
Exercise of warrants			84			84
Exercise of warrants (in Shares)	80,000
Issuance of common stock for research and development license acquired			531			531
Issuance of common stock for research and development license acquired (in Shares)	625,000
Stock-based compensation			175			175
Net loss					(5,314)	(5,314)
Balance at June 30, 2021 at Jun. 30, 2021	$ 9		265,255	$ (264)	(161,917)	103,083
Balance at June 30, 2021 (in Shares) at Jun. 30, 2021	89,531,146	5,559		3
Balance at at Mar. 31, 2021	$ 9		265,192	$ (264)	(160,565)	104,372
Balance at (in Shares) at Mar. 31, 2021	89,531,146	5,559		3
Stock-based compensation			63			63
Net loss					(1,352)	(1,352)
Balance at June 30, 2021 at Jun. 30, 2021	$ 9		$ 265,255	$ (264)	$ (161,917)	$ 103,083
Balance at June 30, 2021 (in Shares) at Jun. 30, 2021	89,531,146	5,559		3