Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	100,000	100,000
Common stock, par value (in dollars per share)	$ 0.006	$ 0.006
Common stock, shares authorized	180,000,000	180,000,000
Common stock, shares issued	10,869,530	10,869,530
Common stock, shares outstanding	10,869,530	10,869,530
Series C convertible preferred stock
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,200	1,200
Preferred stock, liquidation preference value	$ 5,100	$ 5,100
Preferred stock, shares issued	100	100
Preferred stock, shares outstanding	100	100
Series D convertible preferred stock
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	220	220
Preferred stock, liquidation preference value	$ 300	$ 300
Preferred stock, shares issued	40	40
Preferred stock, shares outstanding	40	40
Series E convertible preferred stock
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	3,500	3,500
Preferred stock, liquidation preference value	$ 5,000	$ 5,000
Preferred stock, shares issued	3,478	3,478
Preferred stock, shares outstanding	3,478	3,478
Series F Convertible preferred stock
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	2,200	2,200
Preferred stock, liquidation preference value	$ 5,000	$ 5,000
Preferred stock, shares issued	361	361
Preferred stock, shares outstanding	361	361