Prepaid expenses and other assets

3 Months Ended

Mar. 31, 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)	March 31, 2022		December 31, 2021
Prepaid insurance	$	1,422	$	2,019
Research and development advance payments		636		586
Unbilled reimbursement receivable from DoD		795		1,638
Other prepaids and short-term deposits		571		492
Reimbursement receivable from DoD		—		2,674
	$	3,424	$	7,409