Goodwill and Intangible Assets - Net Book Value (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Unamortizable intangible assets:
Unamortizable intangible assets: Goodwill, Gross Value	$ 16,836	$ 18,491
Unamortizable intangible assets: Accumulated Amortization	0	0
Unamortizable intangible assets: Net Book Value	16,836	18,491
Disposal Group, Disposed of by Sale, Not Discontinued Operations | The Business
Unamortizable intangible assets:
Unamortizable intangible assets: Net Book Value	1,655
In Process Research and Development | Vazculep
Amortizable intangible assets:
Amortizable intangible assets: Gross Value	0	12,061
Amortizable intangible assets: Accumulated Amortization	0	(11,248)
Amortizable intangible assets: Net Carrying Amount	$ 0	$ 813