Intangible Assets, Net and Goodwill - Schedule of Intangible Assets by Class (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross carrying amount	$ 16,986	$ 7,600
Intangible assets subject to amortization, accumulated amortization	(905)	(676)
Intangible assets subject to amortization, net	16,081	6,924
Goodwill	3,290	3,290
Gross Carrying Amount	21,876	12,490
Net Carrying Amount	20,971	11,814
IPR&D
Finite-Lived Intangible Assets [Line Items]
IPR&D	1,600	1,600
Acquired license
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross carrying amount	11,886	5,100
Intangible assets subject to amortization, accumulated amortization	(499)	(373)
Intangible assets subject to amortization, net	$ 11,387	$ 4,727
Remaining Weighted Average Useful Life	10 years 7 months 6 days	9 years 6 months
Non-compete agreements and other covenant rights
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, gross carrying amount	$ 5,100	$ 2,500
Intangible assets subject to amortization, accumulated amortization	(406)	(303)
Intangible assets subject to amortization, net	$ 4,694	$ 2,197
Remaining Weighted Average Useful Life	5 years 7 months 6 days	5 years 6 months