XML 22 R10.htm IDEA: XBRL DOCUMENT v3.20.2
Inventories
 6 Months Ended
Jun. 30, 2020
Inventories [Abstract]  
Inventories

4. Inventories

 

Inventories as of December 31, 2019 and June 30, 2020 consisted of the following:

 

   December 31,   June 30, 
   2019   2020 
Raw materials  $482,836   $542,413 
Work in progress   1,254,490    1,042,250 
Finished goods   6,929,388    3,774,913 
   $8,666,714   $5,359,576 

 

During the three months ended June 30, 2019 and 2020, write-downs of obsolete inventories to lower of cost or market of $494,896 and $47,977, respectively, were charged to cost of revenues.

 

During the six months ended June 30, 2019 and 2020, write-downs of obsolete inventories to lower of cost or market of $557,668 and $457,039, respectively, were charged to cost of revenues.