Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2016	Dec. 31, 2015
Common stock, shares authorized	70,000,000	70,000,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares issued	48,844,503	43,805,586
Common stock, shares outstanding	48,844,503	43,805,586
Series B Preferred Stock
Preferred stock, shares authorized	54,425	54,425
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares issued	83	83
Preferred stock, shares outstanding	83	83
Preferred stock, liquidation preference	$ 0.001	$ 0.001