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Property, Plant and Equipment, Net
 12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, Net
Note 8 - Property, Plant and Equipment, Net
 
 
 
December 31
 
 
 
2020
 
 
2021
 
 
 
US$ thousands
 
 
 
 
 
 
 
 
 
 
Machinery and equipment
 
 
15,494
 
 
 
17,305
 
Office furniture and equipment
 
 
991
 
 
 
1,129
 
Leasehold improvements
 
 
2,884
 
 
 
3,406
 
 
 
 
 
 
 
 
 
 
Property, plant and equipment
 
 
19,369
 
 
 
21,840
 
 
 
 
 
 
 
 
 
 
Accumulated depreciation
 
 
(15,259
)
 
 
(17,264
)
 
 
 
 
 
 
 
 
 
Property, Plant and equipment, net
 
 
4,110
 
 
 
4,576
 

Depreciation expense for the years ended December 31, 2019, 2020 and 2021 were US$ 1,731 thousand, US$ 2,000 thousand and US$ 2,009 thousand, respectively.