CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Common Stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Common Stock, shares authorized	30,000,000	30,000,000
Common Stock, shares issued	7,301,069	3,652,813
Common Stock, shares outstanding	7,273,229	3,624,973
Treasury Stock, shares	27,840	27,840
Convertible Preferred Stock [Member] | Series A Preferred Stock [Member]
Preferred stock, par value (in Dollars per share)	$ 20	$ 20
Preferred stock, shares authorized	416,500	416,500
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Convertible Preferred Stock [Member] | Series B Preferred Stock [Member]
Preferred stock, par value (in Dollars per share)	$ 200	$ 200
Preferred stock, shares authorized	51,000	51,000
Preferred stock, shares issued	648	16,512
Preferred stock, shares outstanding	648	16,512
Preferred stock, liquidation preference (in Dollars)	$ 141,000	$ 141,000