CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue, net	$ 3,676		$ 4,794
Cost of revenue	1,181		2,148
Gross profit	2,495		2,646
Operating expenses:
Research and development	13,984	$ 7,965	27,590	$ 15,737
Sales and marketing	12,368	2,188	23,601	3,626
General and administrative	8,121	5,142	14,381	8,862
Total operating expenses	34,473	15,295	65,572	28,225
Loss from operations	(31,978)	(15,295)	(62,926)	(28,225)
Other income, net	760	457	1,479	828
Net loss	(31,218)	(14,838)	(61,447)	(27,397)
Net loss attributable to common stockholders	$ (31,218)	$ (14,838)	$ (61,447)	$ (27,397)
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)	$ (1.01)	$ (0.56)	$ (1.99)	$ (1.04)
Weighted average common shares outstanding, basic and diluted (in shares)	30,944,899	26,594,854	30,915,577	26,339,250
Other comprehensive income:
Unrealized gain (loss) on marketable securities, net of tax of $0	$ 111	$ (4)	$ 46	$ (56)
Foreign currency translation adjustments	28	87	12	159
Total other comprehensive income	139	83	58	103
Comprehensive loss	(31,079)	$ (14,755)	(61,389)	$ (27,294)
ESKATA product sales
Revenue, net	1,533		1,533
Contract research
Revenue, net	1,143		2,261
Other Revenue [Member]
Revenue, net	$ 1,000		$ 1,000