Note 6 - Prepaid Expenses (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

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

	December 31,		December 31,
	2022		2021
Prepaid research and development	$	3,480	$	1,853
Prepaid insurance		387		461
Professional services		130		124
Retainer and security deposits		-		14
Prepaid rent		-		5
Other		34		31
Total prepaid expenses	$	4,031	$	2,488