Note 3 - Acquisition of UEX Corporation (Details Textual) - UEX Acquisition [Member] $ in Thousands				2 Months Ended
	Aug. 19, 2022 USD ($) shares	Jun. 13, 2022 USD ($) shares	Jun. 13, 2022 $ / shares	Jul. 31, 2022 USD ($) shares
Number of Shares Acquired (in shares)		11,627,907		6,844,000
Shares Acquired, Price Per Share (in CAD per share) | $ / shares			$ 0.43
Asset Acquisition, Consideration Transferred, Total | $	$ 192,673	$ 3,867		$ 1,914
Asset Acquisition, Share Per Share to Holders	0.09
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable, Shares (in shares)	48,518,745
Replacement Options [Member]
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable, Shares (in shares)	2,301,750
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable | $	$ 4,026
Replacement Warrants [Member]
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable, Shares (in shares)	4,660,580
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable | $	$ 8,903