Note 2 - Ownership Interests and Advances (Details Textual) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Impairment of Other Method Securities		$ 0	$ 2,500	$ 0	$ 2,500
Lumesis, Inc. [Member]
Proceeds from Sale of Equity Method Investments	$ 5,300
Equity Method Investment, Realized Gain (Loss) on Disposal	4,700
"Equity Method Investment, Realized Gain (Loss) on Disposal, Other Receivable Related to Indemnification Escrow	$ 800	$ 800		$ 800