Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Preferred Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Deficit	Total
Balance at Dec. 31, 2017			$ 149,425	$ (264)	$ (145,055)	$ 4,106
Balance (in shares) at Dec. 31, 2017	1,467,052	5,559		3
Issuance common stock in equity raise, net of offering cost			2,700			2,700
Issuance common stock in equity raise, net of offering cost (in shares)	522,876
Stock-based compensation			320			320
Stock-based compensation (in shares)	20,097
Cumulative effect of the changes related to adoption of ASC 606					3,245	3,245
Net Income (loss)					1,727	1,727
Balance at Dec. 31, 2018			152,445	$ (264)	(140,083)	12,098
Balance (in shares) at Dec. 31, 2018	2,010,025	5,559		3
Issuance of common stock and prefunded common stock warrants, net of offering cost			787			787
Issuance of common stock and prefunded common stock warrants, net of offering cost (in shares)	221,000
Issuance of common stock, net of offering cost / At-the-market offering			1,047			1,047
Issuance of common stock, net of offering cost / At-the-market offering (in shares)	532,070
Exercise of prefunded common stock warrants
Exercise of prefunded common stock warrants (in shares)	201,961
Warrant exercise
Warrant exercise (in shares)	33,333
Exchange of common shares for prefunded warrants
Exchange of common shares for prefunded warrants (in shares)	(115,269)
Fractional shares adjusted for reverse split
Fractional shares adjusted for reverse split (in shares)	3,371
Stock-based compensation			329			329
Issuance of common stock for research and development - license acquired			2,152			2,152
Issuance of common stock for research and development - license acquired, (in shares)	1,939,058
Distribution of Hoth common stock			(1,698)			(1,698)
Net Income (loss)					(4,183)	(4,183)
Balance at Dec. 31, 2019			$ 155,062	$ (264)	$ (144,266)	$ 10,532
Balance (in shares) at Dec. 31, 2019	4,825,549	5,559		3