Goodwill and Intangible Assets - Gross Value and Net Carrying Amount (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Unamortizable intangible assets:
Gross Value	$ 16,836	$ 18,491
Accumulated Amortization	0	0
Net Carrying Amount	16,836	18,491
Developed technology | Vazculep
Amortizable intangible assets:
Gross Value	0	12,061
Accumulated Amortization	0	(11,248)
Net Carrying Amount	$ 0	$ 813