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

4. Other Property, Plant and Equipment, Net

Other property, plant and equipment, net at the dates indicated below, consisted of the following:

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March 31, 

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December 31,

​

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2022

    

2021

Land

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$

9,163

​

$

9,163

Buildings and leasehold improvements

​

 

248

​

 

191

Machinery and office equipment

​

 

1,360

​

 

1,300

Software and other

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5,861

​

 

5,347

​

​

 

16,632

​

 

16,001

Less: accumulated depreciation

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(5,108)

​

 

(4,749)

Total other property, plant and equipment, net

​

$

11,524

​

$

11,252

​

Depreciation expense related to other property, plant and equipment was $0.4 million and $0.3 million for the three months ended March 31, 2022 and 2021, respectively, and is included in other depreciation and amortization in the consolidated statements of comprehensive income (loss).