Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000	5,000,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	1,581,893	24,055
Common stock, shares outstanding	1,581,880	24,042
Treasury stock, shares	13	13
Accumulated deficit reclassified to additional paid in capital in quasi-reorganization	$ 2,442	$ 2,442
Series 4 Convertible Preferred Stock
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,185	10,185
Preferred stock, shares issued	1	0
Preferred stock, shares outstanding	1	0
Preferred stock, liquidation preference	$ 0	$ 0