Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues:
Total revenues	$ 19,769	$ 11,281
Cost of sales	4,052	3,415
Expenses:
Research and development		2,484
Selling, general and administrative	16,989	13,505
Total expenses	16,989	15,989
Loss from operations	(1,272)	(8,123)
Interest expense, net	(2,561)	(2,505)
Other expense, net		(7)
Loss before income taxes	(3,833)	(10,635)
Income tax expense		(74)
Net loss attributable to common stockholders	$ (3,833)	$ (10,709)
Basic and diluted:
Weighted average common stock shares outstanding	71,344,831	58,062,997
Basic and diluted loss per share	$ (0.05)	$ (0.18)
Product Sales [Member]
Revenues:
Total revenues	$ 19,759	$ 9,838
Product Royalty Revenues [Member]
Revenues:
Total revenues	2	440
Contract Revenues [Member]
Revenues:
Total revenues	$ 8	$ 1,003