REVENUE AND COST OF SALES (Details1) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
REVENUE AND COST OF SALES
Production costs	$ 9,228	$ 6,544	$ 23,939	$ 17,378
Write down of equipment and materials and supplies inventory	4	0	95	0
Depreciation and depletion	720	514	2,067	1,454
Total cost	$ 9,952	$ 7,058	$ 26,101	$ 18,832

The amount of all expenses directly or indirectly attributed to the goods or services sold. Attributed expenses include, but are not limited to, costs previously included in the measurement of inventory that has now been sold, such as depreciation and maintenance of factory buildings and equipment used in the production process, unallocated production overheads, and abnormal amounts of production costs of inventories.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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