CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2015	Dec. 31, 2014
Common stock, par value per share (in dollars per share)	$ 0.000666	$ 0.000666
Common stock, shares authorized	3,950,000,000	3,950,000,000
Common stock, shares issued	159,917,711	82,480,600
Common stock, shares outstanding	159,917,711	82,480,600
Preferred stock, shares authorized	50,000,000	50,000,000
7.5% Series A-1 Convertible Preferred Stock
Preferred stock, par or stated value per share (in dollars per share)	$ 0.000666	$ 0.000666
Preferred stock, shares authorized	1,500,000	1,500,000
Preferred stock, shares issued	0	24,362
Preferred stock, shares outstanding	0	24,362
7.5% Series A-2 Convertible Preferred Stock
Preferred stock, par or stated value per share (in dollars per share)	$ 0.000666	$ 0.000666
Preferred stock, shares authorized	250,000	250,000
Preferred stock, shares issued	0	1,610
Preferred stock, shares outstanding	0	1,610
7.5% Series B Convertible Preferred Stock
Preferred stock, par or stated value per share (in dollars per share)	$ 0.000666	$ 0.000666
Preferred stock, shares authorized	600,000	600,000
Preferred stock, shares issued	0	22,676
Preferred stock, shares outstanding	0	22,676