it has been a week since the last update of my tracking. what should i do? is it taking longer time cause of the holidays?
this is my tracking history :

December 20, 2015 , 3:29 pm
Departed
MALAYSIA
Your item departed a transfer airport in Kuala Lumpur Int'L, MALAYSIA on December 20, 2015 at 3:29 pm. The item is currently in transit to the destination.
December 20, 2015 , 8:42 am
Departed
Taipei, TAIWAN
December 17, 2015 , 11:18 am
Departed
Los Angeles, UNITED STATES
December 17, 2015 , 6:41 am
Arrived
Los Angeles, UNITED STATES
December 16, 2015 , 6:08 am
Processed Through Sort Facility
ISC LOS ANGELES CA (USPS)
December 16, 2015 , 6:08 am
Arrived at Sort Facility
ISC LOS ANGELES CA (USPS)
December 15, 2015
Pre-Shipment Info Sent to USPS

Same here. Last activity also on 20th till now. Hope it's not lost in transit :/