CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 68,348	$ 110,949
Short-term investments	7,114	0
Accounts receivable, net	34,311	37,211
Inventories, net	3,005	3,396
Prepaid and other current assets	26,231	56,551
Total current assets	139,009	208,107
Property and equipment, net	13,050	13,064
Intangible assets, net	641,212	692,099
Investments	8,589	11,784
Other long-term assets	11,014	7,812
Total assets	812,874	932,866
Current liabilities:
Accounts payable	2,188	6,138
Accrued rebates, returns and discounts	63,808	75,759
Accrued liabilities	19,648	31,361
Current portion of Senior Notes	80,000	120,000
Interest payable	9,194	11,645
Other current liabilities	2,100	1,133
Total current liabilities	176,938	246,036
Contingent consideration liability	953	1,038
Senior Notes	117,527	158,309
Convertible Notes	297,550	287,798
Other long-term liabilities	22,467	19,350
Total liabilities	615,435	712,531
Commitments and contingencies
Shareholders’ equity:
Common stock	6	6
Additional paid-in capital	407,944	402,934
Accumulated deficit	(210,506)	(182,600)
Accumulated other comprehensive loss	(5)	(5)
Total shareholders’ equity	197,439	220,335
Total liabilities and shareholders' equity	$ 812,874	$ 932,866