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Balance Sheet Components (Tables)
3 Months Ended
Mar. 31, 2021
Balance Sheet Components  
Schedule of Inventory

Inventory consisted of the following (in thousands):

March 31, 

December 31,

    

2021

    

2020

Raw materials

$

391

$

329

Work-in-process

 

4,779

 

4,910

Finished goods

 

188

 

482

Total inventory

$

5,358

$

5,721

Schedule of accrued liabilities

Accrued liabilities consisted of the following (in thousands):

March 31, 

December 31,

    

2021

    

2020

Payroll-related expenses

$

1,691

$

1,274

Inventory

236

416

Other

 

221

 

542

Total accrued liabilities

$

2,148

$

2,232