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Segment Reporting
 12 Months Ended
Jan. 31, 2020
Segment Reporting [Abstract]  
Segment Reporting Disclosure [Text Block]
14. SEGMENT REPORTING

In the third quarter of fiscal year 2017, the Company began reporting the results of its refined coal operations as a new segment as a result of the refined coal acquisition (see Note 3). The Company has two segments: ethanol and by-products and refined coal. Historical amounts have been reclassified to conform to the current year segment reporting presentation. The Company evaluates the performance of each reportable segment based on net income attributable to REX common shareholders. The following tables summarize segment and other results and assets (amounts in thousands):


   Fiscal Year
   2019  2018  2017
Net sales and revenue:               
Ethanol and by-products  $417,700   $485,885   $452,153 
Refined coal 1   334    786    433 
Total net sales and revenue  $418,034   $486,671   $452,586 
Segment gross profit (loss):               
Ethanol and by-products  $20,402   $43,856   $51,509 
Refined coal   (7,917)   (13,641)   (7,348)
Total gross profit  $12,485   $30,215   $44,161 
(Loss) income before income taxes:               
Ethanol and by-products  $8,469   $31,545   $38,352 
Refined coal   (7,778)   (15,204)   (10,021)
Corporate and other   (1,860)   (1,753)   (2,938)
Total (loss) income before income taxes  $(1,169)  $14,588   $25,393 
Benefit (provision) for income taxes:               
Ethanol and by-products  $1,528   $(2,343)  $3,245 
Refined coal   10,828    24,674    15,168 
Corporate and other   457    591    1,106 
Total benefit for income taxes  $12,813   $22,922   $19,519 
Segment profit (loss):               
Ethanol and by-products  $5,439   $23,346   $35,880 
Refined coal   3,391    10,148    5,628 
Corporate and other   (1,403)   (1,849)   (1,802)
Net income attributable to REX
common shareholders		  $7,427   $31,645   $39,706 

1

Sales in the refined coal segment are recorded net of the cost of coal as the Company purchases the coal feedstock from the customer to which refined coal is sold.


   Fiscal Year
   2019  2018  2017
Sales of products, ethanol and by-products segment:               
Ethanol  $321,434   $368,319   $359,239 
Dried distillers grains   71,755    85,417    63,120 
Non-food grade corn oil   17,135    20,097    21,195 
Modified distillers grains   7,240    11,950    8,525 
Other   136    102    74 
Total sales  $417,700   $485,885   $452,153 
Sales of products, refined coal segment:               
Refined coal  $334   $786   $433 
Interest income:               
Ethanol and by-products  $2,949   $2,460   $878 
Refined coal   —    —    — 
Corporate and other   1,171    1,054    678 
Total interest income  $4,120   $3,514   $1,556 
Depreciation expense:               
Ethanol and by-products  $20,182   $22,004   $20,037 
Refined coal   2,790    2,784    1,385 
Corporate and other   35    40    40 
Total depreciation expense  $23,007   $24,828   $21,462 
Equity in income of unconsolidated affiliates:                 
Ethanol and by-products  $1,392   $1,536   $3,232 
Refined coal   —    —    — 
Corporate and other   —    —    — 
Total equity in income of unconsolidated affiliates  $1,392   $1,536   $3,232 

   January 31,
Assets:  2020  2019
Ethanol and by-products  $408,746   $393,691 
Refined coal   6,101    8,625 
Corporate and other   85,655    69,077 
Total assets
  $500,502   $471,393 
Additions to property and equipment:           
Ethanol and by-products  $3,776   $10,697 
Refined coal   —    78 
Corporate and other   —    — 
Total additions to property and equipment  $3,776   $10,775 

All of the Company’s sales are in the domestic market. The Company’s customers make all decisions with regard to where products they purchase from the Company are distributed.