UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF LOSS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues:
Total revenues	$ 12,243	$ 16,437
Operating expenses:
Cost of products	2,457	3,266
Research and development expenses	5,530	7,329
Selling, general and administrative expenses	7,913	10,446
Intangible asset amortization	203	201
Changes in fair value of contingent consideration	2,478	2,134
Restructuring costs	159	1,228
Total operating expenses	18,740	24,604
Operating loss	(6,497)	(8,167)
Investment and other income, net	(378)	817
Interest expense	(3,190)	(3,062)
Loss on deconsolidation of subsidiary	0	(2,673)
Other expense - changes in fair value of contingent consideration payable	(310)	(307)
Loss before income taxes	(10,375)	(13,392)
Income tax benefit	(9,510)	(374)
Net loss	$ (865)	$ (13,018)
Net income (loss) per share - basic (in dollars per share)	$ (0.02)	$ (0.35)
Net income (loss) per share - diluted (in dollars per share)	$ (0.02)	$ (0.35)
Weighted average number of shares outstanding - basic (in shares)	41,057	37,354
Weighted average number of shares outstanding - diluted (in shares)	41,057	37,354