Note 2 - Ownership Interests and Advances - Schedule of Carrying Value of Ownership Interests (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Equity Method Companies	$ 27,812	$ 27,821
Other Companies	33,101	19,951
Advances to companies	1,680	2,626
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures, Total	62,593	50,398
Partnership Interest [Member]
Equity Method Companies	27,541	27,550
Other Companies	32,833	19,683
Private Equity Funds [Member]
Equity Method Companies	271	271
Other Companies	$ 268	$ 268

Long-Term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership. This does not include advances to clients.

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