Inventories

3 Months Ended

Mar. 31, 2023

Inventory Disclosure [Abstract]

Inventories

4. Inventories

Inventories as of December 31, 2022 and March 31, 2023 consisted of the following:

	December 31,		March 31,
	2022		2023
Raw materials	$	7,101,426	$	4,871,755
Work in progress		17,274,033		15,207,838
Finished goods		25,070,832		30,698,223
	$	49,446,291	$	50,777,816

During the three months ended March 31, 2022 and 2023, write-downs of obsolete inventories to lower of cost or net realizable value of $406,152 and $979,633, respectively, were charged to cost of revenues.