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Inventories | 6 Months Ended
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Jun. 30, 2022
Inventory Disclosure [Abstract] |
Inventories | 4. Inventories Inventories as of December 31, 2021 and June 30, 2022 consisted of the following:
|  | December 31, |  |  | June 30, |
|  | 2021 |  |  | 2022 |
Raw materials |  | $ | 11,323,638 |  |  | $ | 16,750,725 |
Work in progress |  |  | 8,093,002 |  |  |  | 13,850,181 |
Finished goods |  |  | 10,716,700 |  |  |  | 24,705,003 |
|  | $ | 30,133,340 |  |  | $ | 55,305,909 |
During the three months ended June 30, 2021 and 2022, write-downs of obsolete inventories to lower of cost or net realizable value of $104,752 and $493,136, respectively, were charged to cost of revenues. During the six months ended June 30, 2021 and 2022, write-downs of obsolete inventories to lower of cost or net realizable value of $338,057 and $899,288, respectively, were charged to cost of revenues.

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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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