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Property, Plant and Equipment, Net
6 Months Ended
Jun. 30, 2021
Property, Plant and Equipment, Net  
Property, Plant and Equipment, Net

Note 4. Property, Plant and Equipment, Net

The components of our property, plant and equipment are summarized below (in thousands):

June 30, 

December 31, 

2021

2020

Property, plant and equipment:

Machinery and equipment, at cost

$

53,936

$

48,206

Less: accumulated depreciation and amortization

(38,913)

(37,832)

Building, at cost

97,670

94,567

Less: accumulated depreciation and amortization

(16,915)

(15,324)

Leasehold improvements, at cost

 

6,422

 

6,285

Less: accumulated depreciation and amortization

(4,985)

(4,616)

Construction in progress

 

30,026

 

24,539

$

127,241

$

115,825

As of June 30, 2021, the balance of construction in progress was $30.0 million, of which $21.1 million was related to our buildings in our new Dingxing and Kazuo locations, $4.3 million was for manufacturing equipment purchases not yet placed in service and $4.6 million was for our construction in progress for our other consolidated subsidiaries. As of December 31, 2020, the balance of construction in progress was $24.5 million, of which $14.2 million was for our buildings in our new Dingxing and Kazuo locations, $4.0 million was for manufacturing equipment

purchases not yet placed in service and $6.3 million was for our construction in progress at our other consolidated subsidiaries.