Note 12 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Year Ended December 31,
	2022			2021
Expected federal income tax benefit	$	(5,662	)	$	(4,327	)
Disallowed R&D expenses		351			-
Non-taxable R&D rebate		(156	)		-
Other permanent items		214			81
Return to provision		862			(100	)
Stock-based compensation adjustment		213
Foreign rate differential		(270	)		-
Other		27			-
Recognition of foreign net operating loss carryforwards		-			(557	)
Effect of change in valuation allowance		4,421			4,903
Actual federal income tax benefit	$	-		$	-

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	As of December 31,
	2022			2021
Deferred tax assets
Accrued bonus		222			-
Accrued vacation		47			38
Stock-based compensation		4,067			3,007
Capitalized R&D expenses		3,155			-
Intangible assets, net		315			382
Net operating loss carryforwards		11,522			11,511
Other		-			-
Valuation allowance		(19,327	)		(14,937	)
Deferred tax asset	$	1		$	1
Deferred tax liabilities
Fixed assets	$	(1	)	$	(1	)
Net deferred tax asset	$	-		$	-