Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues:
Total revenues	$ 15,114	$ 15,002	$ 31,349	$ 32,450
Expenses:
Cost of goods sold	3,677	4,327	7,841	8,347
Research and development	1,464	1,632	3,219	3,299
Selling, general and administrative	13,670	16,609	28,020	42,282
Asset impairment	368		1,889
Loss (gain) on foreign currency translation	1,867	1,247	71	(688)
Total expenses	23,029	25,954	46,385	56,916
Loss from operations	(7,915)	(10,952)	(15,036)	(24,466)
Other (expense) income:
Interest income	14	255	147	573
Interest expense on notes	(1,084)	(564)	(2,155)	(1,157)
Interest expense on promissory notes	(1,281)	(1,109)	(2,540)	(2,189)
Other income (expense)	14	(17)	10	(31)
Total other expense	(2,337)	(1,435)	(4,538)	(2,804)
Loss before provision for income taxes	(10,252)	(12,387)	(19,574)	(27,270)
Net loss	$ (10,252)	$ (12,387)	$ (19,574)	$ (27,270)
Net loss per share - basic and diluted	$ (0.05)	$ (0.07)	$ (0.09)	$ (0.15)
Shares used to compute basic and diluted net loss per share	213,880	188,054	212,943	187,744
Commercial product sales
Revenues:
Total revenues	$ 6,985	$ 6,065	$ 14,985	$ 11,141
Collaborations and services
Revenues:
Total revenues	8,129	8,937	16,364	21,309
Expenses:
Cost of revenue	$ 1,983	$ 2,139	$ 5,345	$ 3,676