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INVENTORIES | 6 Months Ended
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Jun. 30, 2021
INVENTORIES |
INVENTORIES | NOTE 9 — INVENTORIES Inventories in the Condensed Consolidated Balance Sheets are comprised of the following components: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | ​ | ​ | ​
​ |  | June 30, 2021 |  | December 31, 2020
Raw materials | ​ | $ | 125,080 | ​ | $ | 111,888
Work-in-process | ​ |  | 91,899 | ​ |  | 60,341
Finished goods | ​ |  | 260,698 | ​ |  | 209,029
Total | ​ | $ | 477,677 | ​ | $ | 381,258
​ At June 30, 2021 and December 31, 2020, approximately 35% and 35%, respectively, of total inventories were valued using the last-in, first-out ("LIFO") method. The excess of current cost over LIFO cost was $88,909 and $75,581 at June 30, 2021 and December 31, 2020, 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 http://asc.fasb.org/topic&trid=2126998 + Details
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