REVENUE (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Total consolidated sales	$ 66,685	$ 67,536	$ 165,370	$ 162,063
Potash [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	25,221	27,741	67,151	65,005
Trio [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	35,696	33,192	87,970	82,870
Water [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	332	266	343	1,355
Salt [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	2,187	3,189	4,750	6,488
Magnesium Chloride [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	1,028	1,623	1,547	2,771
Brine Water [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	2,193	1,403	3,564	3,374
Other [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	28	122	45	200
Mineral [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales			165,370	162,063
Potash [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	30,602	33,994	76,721	77,571
Potash [Member] \| Potash [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	25,221	27,799	67,151	65,122
Potash [Member] \| Trio [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Potash [Member] \| Water [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Potash [Member] \| Salt [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	2,160	3,169	4,459	6,304
Potash [Member] \| Magnesium Chloride [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	1,028	1,623	1,547	2,771
Potash [Member] \| Brine Water [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	2,193	1,403	3,564	3,374
Potash [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Trio [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	35,723	33,212	88,261	83,054
Trio [Member] \| Potash [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Trio [Member] \| Trio [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	35,696	33,192	87,970	82,870
Trio [Member] \| Water [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Trio [Member] \| Salt [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	27	20	291	184
Trio [Member] \| Magnesium Chloride [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Trio [Member] \| Brine Water [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Trio [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Corporate Segment and Other Operating Segment
Disaggregation of Revenue [Line Items]
Total consolidated sales	360	330	388	1,438
Corporate Segment and Other Operating Segment \| Potash [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	(58)	0	(117)
Corporate Segment and Other Operating Segment \| Trio [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Corporate Segment and Other Operating Segment \| Water [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	332	266	343	1,355
Corporate Segment and Other Operating Segment \| Salt [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Corporate Segment and Other Operating Segment \| Magnesium Chloride [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Corporate Segment and Other Operating Segment \| Brine Water [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	0	0	0	0
Corporate Segment and Other Operating Segment \| Other [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	28	122	45	200
Intersegment Eliminations [Member] \| Mineral [Member]
Disaggregation of Revenue [Line Items]
Total consolidated sales	$ 0	$ (58)	$ 0	$ (117)