CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Common shares, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common shares, authorized	70,000,000	70,000,000
Common shares, issued	33,332,213	32,421,460
Common shares, outstanding	33,332,213	32,421,460
Excess shares, par value (in dollars per share)	$ 0.0001	$ 0.0001
Excess shares, authorized	30,000,000	30,000,000
Excess shares, issued	0	0