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Property, Plant and Equipment, Net
3 Months Ended
Mar. 31, 2022
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):

March 31, 

December 31, 

2022

2021

Property, plant and equipment:

Machinery and equipment, at cost

$

59,617

$

59,284

Less: accumulated depreciation and amortization

(40,848)

(40,292)

Building, at cost

109,071

108,782

Less: accumulated depreciation and amortization

(19,560)

(18,710)

Leasehold improvements, at cost

 

7,060

 

7,039

Less: accumulated depreciation and amortization

(5,521)

(5,352)

Construction in progress

 

37,467

 

31,664

$

147,286

$

142,415

As of March 31, 2022, the balance of construction in progress was $37.5 million, of which $27.2 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 $6.1 million was for construction in progress for our other consolidated subsidiaries. As of December 31, 2021, the balance of construction in progress was $31.7 million, of which $22.7 million was for our buildings in our new Dingxing and Kazuo locations, $3.0 million was for manufacturing equipment purchases not yet placed in service and $6.0 million was for our construction in progress at our other consolidated subsidiaries.