CONSOLIDATED BALANCE SHEETS - Unaudited (Parenthetical) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
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	37,559,025	36,501,356
Common shares, outstanding	37,559,025	36,501,356
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