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Accounts Payable and Accrued Expenses (Tables)
12 Months Ended
Dec. 31, 2021
Payables And Accruals [Abstract]  
Summary of Accounts Payable and Accrued Expenses

Accounts payable and accrued expenses consisted of the following (in thousands):

 

 

 

As of December 31,

 

 

 

2021

 

 

2020

 

Accounts payable - trade

 

$

1,411

 

 

$

726

 

Payroll and benefits

 

 

1,606

 

 

 

1,489

 

Inventory

 

 

72

 

 

 

965

 

Research and development

 

 

 

 

 

45

 

Royalty fees due to unrelated parties

 

 

51

 

 

 

276

 

Consulting

 

 

79

 

 

 

153

 

Rent and utilities

 

 

127

 

 

 

78

 

Audit and tax fees

 

 

72

 

 

 

57

 

Legal

 

 

58

 

 

 

152

 

Other

 

 

162

 

 

 

164

 

Total accounts payable and accrued expenses

 

$

3,638

 

 

$

4,105