CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues:
Total revenues	$ 2,509	$ 486	$ 11,732	$ 2,129
Operating expenses:
Cost of sales, excluding amortization of acquired intangible assets	327	0	1,363	0
Research and development	3,484	6,233	11,237	14,323
Sales and marketing	7,778	3,646	22,373	5,158
General and administrative	4,365	4,161	13,790	10,662
Amortization of acquired intangible assets	615	0	1,845	0
Total operating expenses	16,569	14,040	50,608	30,143
Loss from operations	(14,060)	(13,554)	(38,876)	(28,014)
Other income (expense):
Interest and other income, net	183	129	692	181
Interest expense	(1,770)	(815)	(4,389)	(1,535)
Loss on extinguishment of debt		0	(3,810)	0
Change in fair value of derivative liability		(18,886)		(45,164)
Total other expense, net	(1,587)	(19,572)	(7,507)	(46,518)
Net loss	$ (15,647)	$ (33,126)	$ (46,383)	$ (74,532)
Net loss per share - basic and diluted	$ (0.15)	$ (0.44)	$ (0.45)	$ (1.27)
Weighted average shares outstanding - basic and diluted	106,938	75,170	102,900	58,840
Net loss	$ (15,647)	$ (33,126)	$ (46,383)	$ (74,532)
Foreign currency translation adjustments			1	2
Comprehensive loss	(15,647)	(33,126)	(46,382)	(74,530)
Product [Member]
Revenues:
Total revenues	1,009	0	8,941	0
License and Collaboration Agreement [Member]
Revenues:
Total revenues	1,054	56	1,125	798
Royalty Income [Member]
Revenues:
Total revenues	$ 446	$ 430	$ 1,666	$ 1,331