Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 60,970	$ 48,972	$ 21,183	$ 38,940	$ 53,317	$ 68,698	$ 18,420	$ 38,351	$ 170,065	$ 178,786	$ 164,026
Cost of sales	13,533	13,892	6,289	11,335	13,361	16,662	5,402	10,846	45,049	46,271	32,655
Gross Profit	47,437	35,080	14,894	27,605	39,956	52,036	13,018	27,505	125,016	132,515	131,371
(Loss) income before taxes	(34,188)	(2,642)	(28,651)	(13,172)	(289)	3,972	(22,777)	(9,306)
Net (loss) income	$ (29,575)	$ 3,011	$ (22,361)	$ (12,585)	$ (1,916)	$ 2,954	$ (18,402)	$ (12,876)	$ (61,510)	$ (30,240)	$ 23,562
Net (loss) income per common share:
Basic (in dollars per share)	$ (0.60)	$ 0.06	$ (0.45)	$ (0.25)	$ (0.04)	$ 0.06	$ (0.37)	$ (0.26)	$ (1.21)	$ (0.60)	$ 0.47
Diluted (in dollars per share)	$ (0.60)	$ 0.06	$ (0.45)	$ (0.25)	$ (0.04)	$ 0.06	$ (0.37)	$ (0.26)	$ (1.21)	$ (0.60)	$ 0.47