v3.26.1
BUSINESS SEGMENT (Information by Segment) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]        
Sales $ 66,685 $ 67,536 $ 165,370 $ 162,063
Lower of cost or net realizable value inventory adjustments 270 419 1,092 1,754
Gross Margin 16,649 12,361 34,321 25,682
Depreciation, depletion and amortization expense [1] 9,300 8,946 19,251 18,802
Potash [Member]        
Segment Reporting [Line Items]        
Sales 30,602 33,994 76,721 77,571
Trio [Member]        
Segment Reporting [Line Items]        
Sales 35,723 33,212 88,261 83,054
Corporate Segment and Other Operating Segment        
Segment Reporting [Line Items]        
Sales 360 330 388 1,438
Total cost of goods sold 72 971 333 1,754
Lower of cost or net realizable value inventory adjustments 0 0 0 0
Gross Margin 288 (583) 55 (199)
Depreciation, depletion and amortization expense [1] 581 773 1,137 1,534
Operating Segments [Member]        
Segment Reporting [Line Items]        
Sales 66,685 67,594 165,370 162,180
Operating Segments [Member] | Potash [Member]        
Segment Reporting [Line Items]        
Sales 30,602 33,994 76,721 77,571
Total cost of goods sold 21,191 23,239 56,228 55,481
Lower of cost or net realizable value inventory adjustments 270 419 1,092 1,754
Gross Margin 4,918 4,858 7,985 7,361
Depreciation, depletion and amortization expense [1] 7,727 7,302 16,163 15,553
Operating Segments [Member] | Trio [Member]        
Segment Reporting [Line Items]        
Sales 35,723 33,212 88,261 83,054
Total cost of goods sold 14,407 16,421 38,726 42,286
Lower of cost or net realizable value inventory adjustments 0 0 0 0
Gross Margin 11,443 8,086 26,281 18,520
Depreciation, depletion and amortization expense [1] 992 871 1,951 1,715
Intersegment Eliminations [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 0 (58) 0 (117)
Freight Costs [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 11,050 11,011 27,780 28,502
Freight Costs [Member] | Corporate Segment and Other Operating Segment        
Segment Reporting [Line Items]        
Total cost of goods sold 0 (58) 0 (117)
Freight Costs [Member] | Operating Segments [Member] | Potash [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 2,591 3,660 8,077 9,446
Freight Costs [Member] | Operating Segments [Member] | Trio [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 8,459 7,409 19,703 19,173
Warehouse and Handling [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 3,046 3,114 6,890 6,604
Warehouse and Handling [Member] | Corporate Segment and Other Operating Segment        
Segment Reporting [Line Items]        
Total cost of goods sold 0 0 0 0
Warehouse and Handling [Member] | Operating Segments [Member] | Potash [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 1,632 1,818 3,339 3,529
Warehouse and Handling [Member] | Operating Segments [Member] | Trio [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 1,414 1,296 3,551 3,075
Mineral [Member]        
Segment Reporting [Line Items]        
Sales     165,370 162,063
Total cost of goods sold 35,670 40,631 95,287 99,521
Mineral [Member] | Operating Segments [Member] | Potash [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 21,191 23,239 56,228 55,481
Mineral [Member] | Operating Segments [Member] | Trio [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 14,407 16,421 38,726 42,286
Mineral [Member] | Operating Segments [Member] | Oil Field Solutions [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold     333 1,754
Mineral [Member] | Intersegment Eliminations [Member]        
Segment Reporting [Line Items]        
Sales $ 0 $ (58) $ 0 $ (117)
[1] Depreciation, depletion, and amortization incurred for potash and Trio® excludes depreciation, depletion and amortization amounts absorbed in or relieved from inventory