Subsequent Events (Details) - USD ($) $ in Thousands	Jan. 28, 2020	Nov. 06, 2019	Oct. 25, 2019
Subsequent Events [Abstract]
Issuance of common stock, net (in shares)		1,219,076	575,830
Warrants to purchase shares of common stock (in shares)		1,219,076	575,830
Gross proceeds from public stock offering		$ 1,360	$ 660
Subsequent Event [Member]
Subsequent Events [Abstract]
Issuance of common stock, net (in shares)	6,046,367
Warrants to purchase shares of common stock (in shares)	17,563,636
Gross proceeds from public stock offering	$ 9,700
Net proceeds from public stock offering	$ 8,600
Series H Preferred Stock [Member] | Subsequent Event [Member]
Subsequent Events [Abstract]
Issuance of common stock, net (in shares)	11,517,269