CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues
Product revenues, net	$ 78,058	$ 75,040	$ 154,569	$ 149,556
Cost of product revenues
Cost of product revenues (excluding intangible asset amortization)	12,899	44,966	40,128	90,442
Intangible asset amortization	16,795	3,688	27,090	7,376
Total cost of products revenues	29,694	48,654	67,218	97,818
Gross profit	48,364	26,386	87,351	51,738
Operating expenses
Research and development	2,493	2,459	5,159	5,451
Selling, general and administrative	29,322	28,935	60,582	61,287
Total operating expenses	31,815	31,394	65,741	66,738
Income (loss) from operations	16,549	(5,008)	21,610	(15,000)
Interest expense	(8,259)	(236)	(13,082)	(470)
Interest income	14	532	226	1,058
Income (loss) before income taxes	8,304	(4,712)	8,754	(14,412)
Provision for income taxes	246		246
Net income (loss)	$ 8,058	$ (4,712)	$ 8,508	$ (14,412)
Earnings (loss) per share - basic (in dollars per share)	$ 0.23	$ (0.14)	$ 0.25	$ (0.43)
Weighted-average shares - basic (in shares)	34,395,266	33,397,709	34,247,977	33,338,243
Earnings (loss) per share - diluted (in dollars per share)	$ 0.23	$ (0.14)	$ 0.24	$ (0.43)
Weighted-average shares - diluted (in shares)	35,091,906	33,397,709	35,089,740	33,338,243