Segment Reporting (Details) - Schedule Of Segment Assets - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Segment Reporting Information [Line Items]
Assets	$ 500,502	$ 471,393
Additions to property and equipment:
Additions to property and equipment:	3,776	10,775
Ethanol [Member]
Segment Reporting Information [Line Items]
Assets	408,746	393,691
Additions to property and equipment:
Additions to property and equipment:	3,776	10,697
Refined Coal [Member]
Segment Reporting Information [Line Items]
Assets	6,101	8,625
Additions to property and equipment:
Additions to property and equipment:		78
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Assets	$ 85,655	$ 69,077