Prepaid expenses and other assets

6 Months Ended

Jun. 30, 2022

Prepaid expenses and other assets

Prepaid expenses and other assets

4. Prepaid expenses and other assets

Prepaid expenses and other assets consisted of the following:

(in thousands)	June 30, 2022		December 31, 2021
CARES Act employee retention credit receivable	$	847	$	—
Prepaid insurance		830		2,019
Research and development advance payments		501		586
Other prepaids and short-term deposits		528		492
Reimbursement receivable from DoD		243		2,674
Unbilled reimbursement receivable from DoD		—		1,638
	$	2,949	$	7,409