REVENUE (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Disaggregation of Revenue [Line Items]
Total consolidated sales	$ 51,034	$ 50,807	$ 216,404	$ 212,870
Potash [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	25,763	26,284	92,914	91,289
Trio [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	18,828	17,933	106,798	100,803
Water [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	682	157	1,025	1,511
Salt [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	2,277	2,677	7,027	9,165
Magnesium Chloride [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	1,923	1,966	3,470	4,737
Brine Water [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	1,554	1,673	5,118	5,047
Other [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	7	117	52	318
Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	51,034	50,847	216,404	213,027
Operating Segments [Member] \| Potash [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	31,281	32,479	108,002	110,050
Operating Segments [Member] \| Potash [Member] \| Potash [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	25,763	26,324	92,914	91,446
Operating Segments [Member] \| Potash [Member] \| Trio [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Operating Segments [Member] \| Potash [Member] \| Water [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Operating Segments [Member] \| Potash [Member] \| Salt [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	2,041	2,516	6,500	8,820
Operating Segments [Member] \| Potash [Member] \| Magnesium Chloride [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	1,923	1,966	3,470	4,737
Operating Segments [Member] \| Potash [Member] \| Brine Water [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	1,554	1,673	5,118	5,047
Operating Segments [Member] \| Potash [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Operating Segments [Member] \| Trio [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	19,064	18,094	107,325	101,148
Operating Segments [Member] \| Trio [Member] \| Potash [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Operating Segments [Member] \| Trio [Member] \| Trio [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	18,828	17,933	106,798	100,803
Operating Segments [Member] \| Trio [Member] \| Water [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Operating Segments [Member] \| Trio [Member] \| Salt [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	236	161	527	345
Operating Segments [Member] \| Trio [Member] \| Magnesium Chloride [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Operating Segments [Member] \| Trio [Member] \| Brine Water [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Operating Segments [Member] \| Trio [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Operating Segments [Member] \| Corporate Segment and Other Operating Segment
Disaggregation of Revenue [Line Items]
Total consolidated sales	689	274	1,077	1,829
Operating Segments [Member] \| Corporate Segment and Other Operating Segment \| Potash [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Operating Segments [Member] \| Corporate Segment and Other Operating Segment \| Trio [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Operating Segments [Member] \| Corporate Segment and Other Operating Segment \| Water [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	682	157	1,025	1,511
Operating Segments [Member] \| Corporate Segment and Other Operating Segment \| Salt [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Operating Segments [Member] \| Corporate Segment and Other Operating Segment \| Magnesium Chloride [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Operating Segments [Member] \| Corporate Segment and Other Operating Segment \| Brine Water [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Operating Segments [Member] \| Corporate Segment and Other Operating Segment \| Other [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	7	117	52	318
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	(40)	0	(157)
Intersegment Eliminations [Member] \| Potash [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	(40)	0	(157)
Intersegment Eliminations [Member] \| Trio [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Intersegment Eliminations [Member] \| Water [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Intersegment Eliminations [Member] \| Salt [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Intersegment Eliminations [Member] \| Magnesium Chloride [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Intersegment Eliminations [Member] \| Brine Water [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Intersegment Eliminations [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	$ 0	0	$ 0
Intersegment Eliminations [Member] \| Mineral [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	$ 0		$ 0