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Prepaid expenses and other assets (Tables)
12 Months Ended
Dec. 31, 2022
Prepaid expenses and other assets  
Schedule of prepaid expenses and other current assets

Prepaid expenses and other current assets consisted of the following:

    

December 31, 

(in thousands)

    

2022

    

2021

Prepaid subscriptions, prepaid service contracts and short-term deposits

$

876

$

492

CARES Act employee retention credit receivable

847

Research and development advance payments

445

586

Prepaid insurance

 

158

2,019

Reimbursement receivable from the DoD

2,674

Unbilled reimbursement receivable from the DoD

1,638

$

2,326

$

7,409