UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF INCOME (LOSS) - 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	$ 10,091	$ 17,554	$ 22,334	$ 33,991
Operating expenses:
Cost of products	3,285	3,622	5,742	6,888
Research and development expenses	4,057	10,292	9,587	17,621
Selling, general and administrative expenses	7,095	6,758	15,008	17,204
Intangible asset amortization	203	204	406	405
Changes in fair value of contingent consideration	918	(377)	3,396	1,757
Gain on sale of hospital business	(45,760)	0	(45,760)	0
Restructuring costs	24	1,506	183	2,734
Total operating (income) expense	(30,178)	22,005	(11,438)	46,609
Operating income (loss)	40,269	(4,451)	33,772	(12,618)
Investment and other (expense) income, net	(741)	950	(1,119)	1,767
Interest expense	(3,237)	(3,106)	(6,427)	(6,168)
Loss on deconsolidation of subsidiary	0	(167)	0	(2,840)
Other expense - changes in fair value of contingent consideration payable	(125)	(50)	(435)	(357)
Income (loss) before income taxes	36,166	(6,824)	25,791	(20,216)
Income tax provision (benefit)	5,292	1,781	(4,218)	1,407
Net income (loss)	$ 30,874	$ (8,605)	$ 30,009	$ (21,623)
Net income (loss) per share - basic (in dollars per share)	$ 0.57	$ (0.23)	$ 0.63	$ (0.58)
Net income (loss) per share - diluted (in dollars per share)	$ 0.49	$ (0.23)	$ 0.58	$ (0.58)
Weighted average number of shares outstanding - basic (in shares)	54,272	37,356	47,665	37,355
Weighted average number of shares outstanding - diluted (in shares)	69,942	37,356	63,083	37,355