Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financial assets:
Warrant assets	$ 3,419	$ 2,972
Marketable investments	1,153	1,451
Financial liabilities:
Contingent consideration payable	8,530	16,900
Fair Value, Inputs, Level 1 [Member]
Financial assets:
Marketable investments	1,034	1,210
Financial liabilities:
Contingent consideration payable
Fair Value, Inputs, Level 2 [Member]
Financial assets:
Marketable investments
Financial liabilities:
Contingent consideration payable
Fair Value, Inputs, Level 3 [Member]
Financial assets:
Marketable investments	119	241
Financial liabilities:
Contingent consideration payable	8,530	16,900
Fair Value, Recurring [Member]
Financial assets:
Warrant assets	3,419	2,972
Marketable investments	1,153	1,451
Financial liabilities:
Contingent consideration payable	8,530	16,900
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Financial assets:
Warrant assets
Marketable investments	1,034	1,210
Financial liabilities:
Contingent consideration payable
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Financial assets:
Warrant assets
Marketable investments
Financial liabilities:
Contingent consideration payable
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Financial assets:
Warrant assets	3,419	2,972	$ 3,555
Marketable investments	119	241
Financial liabilities:
Contingent consideration payable	$ 8,530	$ 16,900