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INVENTORY | 12 Months Ended
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Dec. 31, 2022
INVENTORY |
Inventory | 7. INVENTORY ​ Inventory consisted of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Years Ended December 31,
​ | ​ | 2022 | ​ | 2021
Raw materials | ​ | $ | 5,600 | ​ | $ | 3,685
Work in process | ​ | ​ | 24,672 | ​ | ​ | 1,007
Finished goods | ​ | ​ | 16,229 | ​ | ​ | 12,702
Total inventory | ​ | $ | 46,501 | ​ | $ | 17,394
​ During the year ended December 31, 2022, the expenses related to excess and obsolete inventory that were recorded as a component of cost of products revenues were $1,814. Expenses related to excess and obsolete inventory were immaterial for the years ended December 31, 2021 and 2020. ​ During the years ended December 31, 2022, 2021, and 2020, inventory used in the construction and installation of property and equipment was zero, $516, and $2,299, respectively.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI https://asc.fasb.org/topic&trid=2126998 + Details
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