Note 3 - Acquisition of UEX Corporation (Details Textual) - UEX Acquisition [Member] $ in Thousands	Aug. 19, 2022 USD ($) shares	Jun. 22, 2022 USD ($) shares	Jun. 21, 2022 USD ($) shares	Jun. 21, 2022 $ / shares
Number of Shares Acquired (in shares)		6,844,000	11,627,907
Shares Acquired, Price Per Share (in CAD per share) | $ / shares				$ 0.43
Asset Acquisition, Consideration Transferred, Total | $	$ 192,673	$ 1,914	$ 3,867
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