v3.26.3
BUSINESS SEGMENT (Information by Segment) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Segment Reporting [Line Items]        
Sales $ 51,034 $ 50,807 $ 216,404 $ 212,870
Lower of cost or net realizable value inventory adjustments 247 406 1,339 2,160
Gross Margin 10,041 9,952 44,362 35,634
Depreciation, depletion and amortization expense [1] 9,100 8,843 28,351 27,645
Operating Segments [Member]        
Segment Reporting [Line Items]        
Sales 51,034 50,847 216,404 213,027
Operating Segments [Member] | Potash [Member]        
Segment Reporting [Line Items]        
Sales 31,281 32,479 108,002 110,050
Total cost of goods sold 22,685 21,050 78,913 76,531
Lower of cost or net realizable value inventory adjustments 247 406 1,339 2,160
Gross Margin 3,589 6,264 11,574 13,625
Depreciation, depletion and amortization expense [1] 7,495 7,275 23,658 22,828
Operating Segments [Member] | Trio [Member]        
Segment Reporting [Line Items]        
Sales 19,064 18,094 107,325 101,148
Total cost of goods sold 8,051 9,255 46,777 51,541
Lower of cost or net realizable value inventory adjustments 0 0 0 0
Gross Margin 5,830 4,370 32,111 22,890
Depreciation, depletion and amortization expense [1] 1,038 824 2,989 2,538
Operating Segments [Member] | Corporate Segment and Other Operating Segment        
Segment Reporting [Line Items]        
Sales 689 274 1,077 1,829
Total cost of goods sold 67 956 400 2,710
Lower of cost or net realizable value inventory adjustments 0 0 0 0
Gross Margin 622 (682) 677 (881)
Depreciation, depletion and amortization expense [1] 567 744 1,704 2,279
Intersegment Eliminations [Member]        
Segment Reporting [Line Items]        
Sales 0 (40) 0 (157)
Lower of cost or net realizable value inventory adjustments 0 0 0 0
Gross Margin 0 0 0 0
Depreciation, depletion and amortization expense [1] 0 0 0 0
Freight Costs [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 7,137 6,579 34,917 35,081
Freight Costs [Member] | Operating Segments [Member] | Potash [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 3,013 3,146 11,090 12,592
Freight Costs [Member] | Operating Segments [Member] | Trio [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 4,124 3,473 23,827 22,646
Freight Costs [Member] | Operating Segments [Member] | Corporate Segment and Other Operating Segment        
Segment Reporting [Line Items]        
Total cost of goods sold 0 0 0 0
Freight Costs [Member] | Intersegment Eliminations [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 0 (40) 0 (157)
Warehouse and Handling [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 2,806 2,609 9,696 9,213
Warehouse and Handling [Member] | Operating Segments [Member] | Potash [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 1,747 1,613 5,086 5,142
Warehouse and Handling [Member] | Operating Segments [Member] | Trio [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 1,059 996 4,610 4,071
Warehouse and Handling [Member] | Operating Segments [Member] | Corporate Segment and Other Operating Segment        
Segment Reporting [Line Items]        
Total cost of goods sold 0 0 0 0
Warehouse and Handling [Member] | Intersegment Eliminations [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 0 0 0 0
Mineral [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 30,803 31,261 126,090 130,782
Mineral [Member] | Operating Segments [Member] | Potash [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 22,685 21,050 78,913 76,531
Mineral [Member] | Operating Segments [Member] | Trio [Member]        
Segment Reporting [Line Items]        
Total cost of goods sold 8,051 9,255 46,777 51,541
Mineral [Member] | Operating Segments [Member] | Corporate Segment and Other Operating Segment        
Segment Reporting [Line Items]        
Total cost of goods sold 67 956 400 2,710
Mineral [Member] | Intersegment Eliminations [Member]        
Segment Reporting [Line Items]        
Sales 0   0  
Total cost of goods sold $ 0 $ 0 $ 0 $ 0
[1] Depreciation, depletion, and amortization incurred for potash and Trio® excludes depreciation, depletion and amortization amounts absorbed in or relieved from inventory