CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - 6 months ended Jun. 30, 2016 - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Total
Balance as of beginning of the period at Dec. 31, 2015	$ 38	$ 309,078	$ (130,510)	$ (42)	$ 178,564
Balance as of beginning of the period (in shares) at Dec. 31, 2015	38,524,922
Stockholders' Equity
Exercise of stock options	$ 1	589			590
Exercise of stock options (in shares)	219,266
Stock-based compensation		2,922			2,922
Other comprehensive income, net of tax				67	67
Net loss			(30,183)		(30,183)
Balance as of end of the period at Jun. 30, 2016	$ 39	$ 312,589	$ (160,693)	$ 25	$ 151,960
Balance as of end of the period (in shares) at Jun. 30, 2016	38,744,188