Note 10 - Fair Value Measurements - Recurring Fair Value Measurements (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Dec. 31, 2025	Mar. 31, 2025
Contingent consideration for business combination – financial liability	$ (3,580)
Total	(2,005)	$ 349
Future [Member]
Commodity futures – financial assets, net	1,575	349
Fair Value, Inputs, Level 1 [Member]
Contingent consideration for business combination – financial liability	0
Total	1,575	349
Fair Value, Inputs, Level 1 [Member] | Future [Member]
Commodity futures – financial assets, net	1,575	349
Fair Value, Inputs, Level 2 [Member]
Contingent consideration for business combination – financial liability	0
Total	0	0
Fair Value, Inputs, Level 2 [Member] | Future [Member]
Commodity futures – financial assets, net	0	0
Fair Value, Inputs, Level 3 [Member]
Contingent consideration for business combination – financial liability	(3,580)
Total	(3,580)	0
Fair Value, Inputs, Level 3 [Member] | Future [Member]
Commodity futures – financial assets, net	$ 0	$ 0