Note 5 - Prepaid Expenses (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]

	As of March 31,		As of December 31,
	2022		2021
Prepaid research and development	$	2,927	$	1,853
Prepaid insurance		613		461
Professional services		293		124
Other		41		50
Total prepaid expenses	$	3,874	$	2,488