CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues:
Total revenues	$ 25,472	$ 34,565	$ 77,686	$ 76,099
Costs and expenses:
Cost of sales	3,050	6,462	10,936	13,099
Research and development expenses	0	1,316	0	3,983
Selling, general and administrative expenses	9,313	27,607	43,279	83,052
Amortization of intangible assets	7,175	5,587	20,939	18,237
Restructuring charges	0	268	1,089	6,787
Total costs and expenses	19,538	41,240	76,243	125,158
Income (loss) from operations	5,934	(6,675)	1,443	(49,059)
Other (expense) income :
Interest expense	(2,495)	(3,050)	(7,783)	(13,328)
Other gain (loss), net	344	253	747	(3,571)
Total other (expense) income	(2,151)	(2,797)	(7,036)	38,894
Net income (loss) before income taxes	3,783	(9,472)	(5,593)	(10,165)
Income tax (expense) benefit	(46)	(1,050)	(294)	6,374
Net income (loss)	3,737	(10,522)	(5,887)	(3,791)
Comprehensive income (loss)	$ 3,737	$ (10,522)	$ (5,887)	$ (3,791)
Basic net income (loss) per share (in dollars per share)	$ 0.08	$ (0.35)	$ (0.14)	$ (0.15)
Diluted net income (loss) per share (in dollars per share)	$ 0.08	$ (0.35)	$ (0.14)	$ (0.15)
Shares used in computing basic net income (loss) per share (in shares)	44,969	29,891	42,550	24,958
Shares used in computing diluted net income (loss) per share (in shares)	45,055	29,891	42,550	24,958
Convertible notes
Other (expense) income :
Loss on extinguishment of debt	$ 0	$ 0	$ 0	$ (47,880)
Senior Notes
Other (expense) income :
Loss on extinguishment of debt	0	0	0	(8,233)
Product sales, net
Revenues:
Total revenues	25,997	33,664	77,271	61,974
Commercialization agreement, net
Revenues:
Total revenues	0	0	0	11,258
Royalties and milestones
Revenues:
Total revenues	416	299	1,391	1,158
Other revenue
Revenues:
Total revenues	(941)	602	(976)	1,709
Gralise
Other (expense) income :
Loss (Gain) on sale of assets	0	0	0	126,655
NUCYNTA
Other (expense) income :
Loss (Gain) on sale of assets	$ 0	$ 0	$ 0	$ (14,749)