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Accrued Liabilities (Tables)
12 Months Ended
Dec. 31, 2021
Accrued Liabilities Current [Abstract]  
Summary of Accrued Liabilities

Accrued liabilities were comprised of the following (in thousands):

 

 

 

As of December 31,

 

 

 

2021

 

 

2020

 

Payroll-related

 

$

2,818

 

 

$

1,482

 

Property, plant and equipment

 

 

1,446

 

 

 

88

 

Other

 

 

1,231

 

 

 

757

 

Total current accrued liabilities

 

$

5,495

 

 

$

2,327