Note 9 - Investments - Schedule of Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Rafael Holdings, Inc.	$ 600	$ 357
Other Current Assets [Member]
Equity investments included in other current assets	7,305	5,657
Other Noncurrent Assets [Member]
Equity investments included in other noncurrent assets	6,897	5,673
Other Noncurrent Assets [Member] | Investment, PRI Fuel Supply Ltd [Member]
Equity method	57	454
Other Noncurrent Assets [Member] | Investment, CPP Genie Community Solar [Member]
Equity method	107	242
Measurement Input, Quoted Price [Member] | Rafael Holdings, Inc [Member]
Rafael Holdings, Inc.	600	357
Measurement Input, Net Asset Value [Member] | Other Current Assets [Member]
Alternative investments—restricted (see Note 19)	6,705	5,057
Measurement Input, Net Asset Value [Member] | Other Noncurrent Assets [Member]
Alternative investments—restricted (see Note 19)	5,260	2,877
Measurement Input, Cost to Sell [Member] | Other Current Assets [Member]
Alternative investments—restricted (see Note 19)	600	600
Measurement Input, Cost to Sell [Member] | Other Noncurrent Assets [Member]
Alternative investments—restricted (see Note 19)	443	1,000
Alternative investments—unrestricted	$ 1,030	$ 1,100