5. Prepaid Expenses and Other Current Assets

12 Months Ended

Dec. 31, 2021

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

5. Prepaid Expenses and Other Current Assets

5. Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets are comprised of the following (in thousands):

		December 31,
		2021		2020
Prepaid insurance	$	59	$	50
Prepaid clinical costs		4,481		1,743
Other		187		39
Prepaid expenses and other current assets	$	4,727	$	1,832