Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2017	Dec. 31, 2016
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	5,000,000	5,000,000
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized shares	150,000,000	150,000,000
Common stock issued	41,401,422	41,386,506
Common stock, outstanding shares	41,401,422	41,386,506
Class A Convertible Preferred Shares
Preferred stock, issued shares	2,819,549	2,819,549
Preferred stock, outstanding shares	2,819,549	2,819,549