CONSOLIDATED BALANCE SHEETS (parenthetical) - $ / shares	Jun. 30, 2017	Dec. 31, 2016
CONSOLIDATED BALANCE SHEETS
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	17,360,302	16,628,476
Common stock, shares outstanding	17,286,836	16,628,476
Treasury stock (in shares)	73,466	0