CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - 6 months ended Jun. 30, 2017 - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Total
Balance at Dec. 31, 2016		$ 260,671	$ (269)	$ (90,912)	$ 169,490
Balance (in shares) at Dec. 31, 2016	26,059,181				26,059,181
Increase (Decrease) in Stockholders' Equity
Issuance of common stock in connection with private placement		19,311			$ 19,311
Issuance of common stock in connection with private placement, shares	635,000
Exercise of stock options and vesting of RSUs		180			180
Exercise of stock options and vesting of RSUs, shares	42,336
Unrealized loss on marketable securities			(56)		(56)
Foreign currency translation adjustment			159		159
Stock-based compensation expense		6,457			6,457
Net loss				(27,397)	(27,397)
Balance at Jun. 30, 2017		$ 286,619	$ (166)	$ (118,309)	$ 168,144
Balance (in shares) at Jun. 30, 2017	26,736,517				26,736,517