Note 10 - Investments in Equity Securities (Details Textual) - USD ($) $ in Thousands	2 Months Ended	3 Months Ended
	Dec. 16, 2022	Oct. 31, 2022	Aug. 19, 2022	Jul. 31, 2022
Equity Securities, FV-NI, Total		$ 5,666		$ 14,834
Payments to Acquire Equity Securities, FV-NI		135
Subsequent Event [Member]
Payments to Acquire Equity Securities, FV-NI	$ 18,413
Anfield Shares [Member]
Equity Securities, FV-NI, Total		4,814		5,776
Anfield Warrant [Member]
Equity Securities, FV-NI, Total		705		2,144
ALX Resource Corp Common Shares [Member]
Equity Securities, FV-NI, Total		$ 147		0
UEX Shares [Member]
Equity Securities, FV-NI, Total			$ 5,830	$ 6,914